75 Mental Ability Test Questions for Class 5 with Answers

Presenting a collection of mental ability test questions with answers created for class 5 students. The 50 questions are carefully selected for young minds. A few of the questions are challenging and might require parental guidance. The questions range from puzzles to pattern recognition to riddles. These questions are selected not to assess students but to enhance their problem-solving skills.

Each question in the list comes with multiple-choice answers. It makes the whole exercise ideal for quick learning sessions at home. Each question contains detailed answers explaining how the question is solved and provides insights into the reasoning process. This will help the students understand the logic behind each solution. Let’s directly go into our mental ability questions designed for Class 5 and watch your child’s problem-solving skills grow!

List of 75 Mental Ability Test Questions for Class 5

Question 1. What comes next in the sequence: 3, 6, 12, 24, …?

a) 36
b) 48
c) 30
d) 50

Answer:

b) 48 — The sequence doubles each time. (3×2=6, 6×2=12, 12×2=24, so 24×2=48).

Question 2. Spot the odd one out: 16, 25, 36, 45, 64

a) 16
b) 25
c) 45
d) 64

Answer:

c) 45 — All other numbers are perfect squares (4², 5², 6², 8²), but 45 is not.

Question 3. If RABBIT is coded as 1811212920, how will FOX be coded?

a) 61524
b) 6424
c) 62415
d) 61525

Answer:

a) 61524 — Each letter is represented by its position in the alphabet. R(18), A(1), B(2), B(2), I(9), T(20); similarly, F(6), O(15), X(24).

Question 4. What comes next in the pattern: Z, X, V, T, …?

a) S
b) R
c) Q
d) P

Answer:

d) P — The pattern follows the sequence of skipping one letter backwards in the alphabet (Z→X→V→T→P).

Question 5. In a line of children, a child is 5th from either end of the line. How many children are there in the line?

a) 9
b) 10
c) 11
d) 12

Answer:

a) 9 — If the child is 5th from either end, there are 4 children on each side of him, making a total of 4+4+1=9 children.

Question 6. If BOOK is written as KOBO, how is SHIP written?

a) IHPA
b) IHSP
c) PIHS
d) IPSH

Answer:

c) PIHS — The pattern is to reverse the first and last two letters separately (BO→OB, OK→KO; SH→HS, IP→PI).

Question 7. If 2 * 5 = 52, 3 * 6 = 93, 4 * 7 = 147, what is 5 * 8?

a) 85
b) 58
c) 158
d) 815

Answer:

d) 815 — The pattern is to write the numbers next to each other in reverse order (2 and 5 form 52, 3 and 6 form 93, 4 and 7 form 147; so 5 and 8 form 815).

Question 8. A clock shows 4:20. What is the angle between the hour and the minute hands?

a) 10°
b) 20°
c) 30°
d) 40°

Answer:

b) 20° — At 4:20, the hour hand will have moved a third of the way between the 4 and the 5, which is 4.33 hours. Since each hour represents 30 degrees (360 degrees / 12 hours), the hour hand is 4.33 hours × 30 degrees/hour = 130 degrees from the top of the clock.
The minute hand at 20 minutes is at 120 degrees (as each minute represents 6 degrees, and 20 × 6 = 120).

Therefore, the angle between the hour and minute hands is 130 – 120 = 10 degrees.

Question 9. Which number should replace the question mark in the following series: 1, 4, 9, 16, ?, 36

a) 20
b) 25
c) 24
d) 30

Answer:

b) 25 — The series is the squares of consecutive natural numbers (1²=1, 2²=4, 3²=9, 4²=16, 5²=25, 6²=36).

Question 10. If ‘BLUE’ is coded as ‘4863’, what will be the code for ‘PINK’?

a) 7965
b) 7596
c) 9657
d) 9675

Answer:

a) 7965 — Each letter is assigned a number: B=4, L=8, U=6, E=3. Similarly, P=7, I=9, N=6, K=5.

Question 11. If 3 * 4 = 34, 5 * 6 = 56, what is 7 * 8?

a) 56
b) 78
c) 87
d) 76

Answer:

b) 78 — The pattern is to write the numbers next to each other (3 and 4 form 34, 5 and 6 form 56; so 7 and 8 form 78).

Question 12. Find the odd one out: triangle, rectangle, circle, square

a) triangle
b) rectangle
c) circle
d) square

Answer:

c) circle — All others are polygons, but a circle is not.

Question 13. In a code language, CHAIR is written as 38194. How is TABLE written in that language?

a) 20513
b) 21503
c) 20153
d) 21035

Answer:

a) 20513 — Each letter is represented by its reverse position in the alphabet (C=3, H=8, A=1, I=9, R=4; similarly, T=20, A=1, B=2, L=12, E=5).

Question 14. Which comes next in the series: O, T, T, F, F, S, S, …?

a) E
b) S
c) N
d) T

Answer:

a) E — The pattern is the first letter of the numbers one, two, three, four, five, six, seven, and then eight.

Question 15. How many triangles are there in a diagram made up of a square with both diagonals drawn?

a) 4
b) 6
c) 8
d) 10

Answer:

c) 8 — The diagonals divide the square into 4 small triangles, and each half of the square (divided by a diagonal) contains 2 additional triangles formed by the other diagonal, totaling 8.

Question 16. If ‘car’ is to ‘road’ as ‘boat’ is to …?

a) air
b) track
c) water
d) rail

Answer:

c) water — A car travels on a road; similarly, a boat travels on water.

Question 17. In a sequence of numbers, each number is double the previous number minus two. If the first number is 5, what is the third number in the sequence?

a) 16
b) 18
c) 20
d) 22

Answer:

b) 18 — The sequence is 5, (5×2)-2=8, (8×2)-2=14, (14×2)-2=26. The third number is 14.

Question 18. What comes next in the sequence: Cat, Dog, Mouse, Squirrel, …?

a) Elephant
b) Rabbit
c) Bear
d) Lion

Answer:

b) Rabbit — Assuming a pattern of increasing size, the next smallest commonly known animal after a squirrel is a rabbit.

Question 19. Complete the analogy: Glove is to Hand as Sock is to …?

a) Shoe
b) Foot
c) Head
d) Hand

Answer:

b) Foot — A glove is worn on the hand; similarly, a sock is worn on the foot.

Question 20. If ‘glass’ is coded as ‘ssalg’, how is ‘plate’ coded?

a) etalp
b) telap
c) epatl
d) eplat

Answer:

a) etalp — The pattern is to reverse the letters of the word (glass → ssalg; plate → etalp).

Question 21. Which number does not belong in the following series: 2, 3, 5, 7, 11, 14?

a) 2
b) 3
c) 11
d) 14

Answer:

d) 14 — All other numbers are prime numbers, but 14 is not.

Question 22. If ‘PEN’ is to ‘NIB’ as ‘BRUSH’ is to…?

a) STICK
b) PAINT
c) HANDLE
d) ART

Answer:

c) HANDLE — Just as a pen has a nib, a brush typically has a handle.

Question 23. Find the odd one out: square, rectangle, triangle, circle, oval

a) square
b) rectangle
c) triangle
d) circle

Answer:

d) circle — All others are polygons with straight sides, while a circle has no sides.

Question 24. If 3 × 3 = 5, 4 × 4 = 7, what is 5 × 5?

a) 8
b) 9
c) 10
d) 11

Answer:

c) 10 — The pattern adds 2 to the actual result of the multiplication (3 × 3 = 9; 9 – 4 = 5, 4 × 4 = 16; 16 – 9 = 7, so 5 × 5 = 25; 25 – 15 = 10).

Question 25. What is the next shape in the sequence: circle, triangle, hexagon, …?

a) square
b) octagon
c) pentagon
d) nonagon

Answer:

b) octagon — The number of sides is increasing by multiples of three (circle is considered 0, triangle has 3 sides, hexagon has 6 sides, next is 9 sides).

Question 26. Which word completes the analogy: Cold is to Ice as Heat is to…?

a) Sun
b) Fire
c) Water
d) Vapor

Answer:

b) Fire — Just as cold is associated with ice, heat is associated with fire.

Question 27. Rearrange the letters in “ANTEL” to form the name of a body part.

a) NEATL
b) LENT
c) LATEN
d) LANE

Answer:

a) NEATL — Rearranged, “ANTEL” forms “LEANT,” which isn’t a body part. The correct answer to the intended question (a mistake seems in the options) is “LATEN” rearranged to “LATEN”, which should be “NATAL”, a body part.

Question 28. If you move 3 letters from ‘POST’ to make a new word, which is it?

a) STOP
b) TOPS
c) SPOT
d) OPTS

Answer:

c) SPOT — By rearranging the letters in ‘POST’, you get ‘SPOT’.

Question 29. Complete the series: 1, 4, 9, 16, 25, …?

a) 34
b) 36
c) 49
d) 50

Answer:

c) 36 — The series is the squares of consecutive natural numbers (1², 2², 3², 4², 5², …).

Question 30. If ‘WINDOW’ is coded as ‘ZZRKOV’, how is ‘DOOR’ coded?

a) XXMLL
b) WWMNQ
c) VVNNP
d) UUOLM

Answer:

c) VVNNP — The pattern seems to be moving each letter backwards in the alphabet by a specific rule or set pattern.

Question 31. Which number is next in the sequence: 1, 1, 2, 3, 5, 8, …?

a) 10
b) 11
c) 13
d) 15

Answer:

c) 13 — This sequence is known as the Fibonacci sequence, where each number is the sum of the two preceding ones.

Question 32. Spot the different one: square, rhombus, pentagon, triangle

a) square
b) rhombus
c) pentagon
d) triangle

Answer:

c) pentagon — All others have four sides, while a pentagon has five.

Question 33. If WATER is coded as 21418, how is HONEY coded?

a) 815259
b) 81525
c) 7181425
d) 71825

Answer:

b) 81525 — Each letter is represented by its position in the alphabet (W=23, A=1, T=20, E=5, R=18; similarly, H=8, O=15, N=14, E=5, Y=25).

Question 34. What comes next in the pattern: 2, 4, 8, 16, 32, …?

a) 48
b) 60
c) 64
d) 72

Answer:

c) 64 — The pattern is each number multiplied by 2 (2, 4, 8, 16, 32, 64).

Question 35. Find the number of squares in a 3×3 grid.

a) 9
b) 10
c) 14
d) 18

Answer:

c) 14 — There are 9 single squares, 4 squares made up of 2×2 cells, and 1 large square made up of the entire 3×3 grid.

Question 36. Which is the correct pair, similar to ‘Glove: Hand’?

a) Cap: Neck
b) Belt: Waist
c) Shoe: Ear
d) Hat: Foot

Answer:

b) Belt: Waist — Just as gloves are worn on hands, belts are worn on the waist.

Question 37. In a certain pattern, 7 = 14, 8 = 16, then what does 9 equal?

a) 17
b) 18
c) 19
d) 20

Answer:

b) 18 — The pattern is each number multiplied by 2 (7×2=14, 8×2=16, 9×2=18).

Question 38. Which term comes next in the sequence: ‘January’, ‘February’, ‘March’, …?

a) April
b) May
c) June
d) July

Answer:

a) April — The terms are months of the year in order.

Question 39. Complete the analogy: Book is to Reading as Fork is to…?

a) Cooking
b) Eating
c) Serving
d) Cutting

Answer:

b) Eating — Just as a book is used for reading, a fork is used for eating.

Question 40. If ‘TREE’ is coded as ‘REET’, how is ‘LAMP’ coded?

a) PMAL
b) PALM
c) MLAP
d) MPAL

Answer:

a) PMAL — The pattern is to reverse the letters of the word (TREE → REET; LAMP → PMAL).

Question 41. I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I?

a) Shadow
b) Echo
c) Flame
d) River

Answer:

b) Echo — An echo can “speak” when it bounces back sound and “hears” as it picks up noises.

Question 42. I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

a) Breath
b) Bubble
c) Cloud
d) Thought

Answer:

a) Breath — You can hold your breath only for a short time, even if you are very strong.

Question 43. I’m taken from a mine, and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

a) Gold
b) Coal
c) Pencil lead
d) Diamond

Answer:

c) Pencil lead — It is mined as graphite, and used in pencils by almost everyone.

Question 44. What has keys but can’t open locks?

a) Map
b) Book
c) Piano
d) Heart

Answer:

c) Piano — A piano has keys but they are for playing music, not for opening locks.

Question 45. What has words, but never speaks?

a) Dream
b) Book
c) Song
d) Story

Answer:

b) Book — A book has words but it cannot speak on its own.

Question 46. I fly without wings. I cry without eyes. Whenever I go, the darkness flies. What am I?

a) Wind
b) Light
c) Cloud
d) Rain

Answer:

b) Light — Light travels (flies) without wings and dispels darkness.

Question 47. What comes once in a minute, twice in a moment, but never in a thousand years?

a) The letter ‘m’
b) The letter ‘e’
c) The letter ‘t’
d) The letter ‘s’

Answer:

a) The letter ‘m’ — The letter ‘m’ appears once in “minute,” twice in “moment,” but not at all in “thousand years.”

Question 48. What has a head, a tail, is brown, and has no legs?

a) Dog
b) Coin
c) Snake
d) Worm

Answer:

b) Coin — A coin typically has a head and a tail side, is brownish in color, and of course, has no legs.

Question 49. What begins with T, ends with T, and has T in it?

a) Teapot
b) Truck
c) Ticket
d) Tent

Answer:

a) Teapot — A teapot starts and ends with ‘T’ and contains tea, which sounds like ‘T’.

Question 50. You see a boat filled with people. It has not sunk, but when you look again you don’t see a single person on the boat. Why?

a) It’s invisible
b) They’re below deck
c) It’s a ghost ship
d) They’re all hiding

Answer:

b) They’re below deck — The people are still on the boat but are not visible because they are below deck.

Question 51. If A is the sister of B, B is the brother of C, and C is the son of D, how is D related to A?

a) Mother
b) Father
c) Aunt
d) Uncle

Answer:

b) Father — A is D’s daughter.

Question 52. Pointing to a photograph, John said, “She is the daughter of my grandfather’s only son.” How is the girl in the photograph related to John?

a) Sister
b) Cousin
c) Aunt
d) Niece

Answer:

a) Sister — John’s grandfather’s only son is his father, so the girl is his sister.

Question 53. If Sam is the son of Tina’s brother, how is Tina related to Sam?

a) Mother
b) Aunt
c) Sister
d) Cousin

Answer:

b) Aunt — Tina is Sam’s father’s sister.

Question 54. If M is the mother of N, and N is the mother of O, how is O related to M?

a) Daughter
b) Granddaughter
c) Niece
d) Sister

Answer:

b) Granddaughter — O is the daughter of M’s daughter.

Question 55. If A is married to B, and B is the brother of C, how is A related to C?

a) Sister-in-law
b) Aunt
c) Mother
d) Cousin

Answer:

a) Sister-in-law — A is C’s brother’s wife.

Question 56. What comes next in the series: 2, 5, 10, 17, …?

a) 26
b) 27
c) 28
d) 29

Answer:

a) 26 — The sequence increases by consecutive odd numbers.

Question 57. If 5 + 3 = 28, 7 + 2 = 63, what does 6 + 4 equal?

a) 24
b) 64
c) 36
d) 54

Answer:

d) 54 — The pattern is to multiply the numbers and then reverse them.

Question 58. Which number should replace the question mark: 3, 7, 15, 31, …?

a) 47
b) 55
c) 63
d) 66

Answer:

b) 63 — Each number is doubled and then increased by 1.

Question 59. What is the missing number: 4, 9, 16, 25, …?

a) 36
b) 49
c) 56
d) 81

Answer:

a) 36 — The sequence follows the pattern of squares of consecutive numbers.

Question 60. Complete the sequence: 1, 1, 2, 6, 24, …?

a) 120
b) 36
c) 48
d) 30

Answer:

a) 120 — The sequence follows the pattern of factorials (1!, 1!, 2!, 3!, 4!).

Question 61. What day comes three days after the day before yesterday if today is Wednesday?

a) Friday
b) Saturday
c) Sunday
d) Monday

Answer:

a) Friday — The day before yesterday was Monday, so three days after Monday is Thursday.

Question 62. If it takes 5 minutes to boil an egg, how long does it take to boil 5 eggs?

a) 5 minutes
b) 10 minutes
c) 15 minutes
d) 25 minutes

Answer:

a) 5 minutes — All eggs can be boiled together in the same pot.

Question 63. A clock shows the time as 3:30. What is the angle between the hour and minute hands?

a) 75 degrees
b) 90 degrees
c) 105 degrees
d) 120 degrees

Answer:

c) 105 degrees — The hour hand is at 105 degrees, and the minute hand is at 180 degrees.

Question 64. If two pens cost ₹30, how much do five pens cost?

a) ₹75
b) ₹90
c) ₹120
d) ₹150

Answer:

b) ₹75 — The cost per pen is ₹15, so five pens cost ₹15 * 5 = ₹75.

Question 65. If it rains on the first and third days of the month, what is the probability that it rains on a random day in the first week?

a) 1/7
b) 2/7
c) 3/7
d) 4/7

Answer:

b) 2/7 — There are two days out of seven with rain.

Question 66. If CAT is coded as 3120, what is the code for DOG?

a) 4715
b) 4765
c) 7615
d) 5716

Answer:

b) 4765 — Each letter is replaced by its position in the alphabet multiplied by 5.

Question 67. Find the odd one out: Apple, Banana, Grapes, Carrot, Mango

a) Apple
b) Banana
c) Carrot
d) Mango

Answer:

c) Carrot — All others are fruits, while Carrot is a vegetable.

Question 68. If TABLE is written as ELBAT, how is CHAIR written?

a) RIAHC
b) RIAHC
c) HRIAC
d) RIHAC

Answer:

a) RIAHC — The word is written in reverse order.

Question 69. What comes next in the pattern: A, C, F, J, …?

a) K
b) L
c) M
d) N

Answer:

b) L — The sequence follows adding consecutive prime numbers (A+2=C, C+3=F, F+4=J, J+5=L).

Question 70. Complete the analogy: Fish is to Water as Bird is to …?

a) Sky
b) Tree
c) Nest
d) Worm

Answer:

a) Sky — Fish live in water, and birds fly in the sky.

Question 71. Which of the following is the odd one out: Circle, Triangle, Square, Hexagon

a) Circle
b) Triangle
c) Square
d) Hexagon

Answer:

a) Circle — All others have straight sides, while Circle is round.

Question 72. Find the odd one out: Table, Chair, Bed, Spoon, Sofa

a) Table
b) Chair
c) Spoon
d) Sofa

Answer:

c) Spoon — All others are pieces of furniture, while Spoon is an eating utensil.

Question 73. Which one does not belong: Red, Green, Blue, Circle

a) Red
b) Green
c) Blue
d) Circle

Answer:

d) Circle — All others are colors, while Circle is a shape.

Question 74. Identify the odd one out: Dog, Cat, Lion, Fish

a) Dog
b) Cat
c) Lion
d) Fish

Answer:

d) Fish — All others are land animals, while Fish lives in water.

Question 75. Spot the odd one out: Sun, Moon, Star, Car

a) Sun
b) Moon
c) Star
d) Car

Answer:

d) Car — All others are celestial objects, while Car is a vehicle.