Introducing 50 mental ability test questions with answers for class 6 students inspired by the NTSE exam format. The questions are carefully curated to balance ease and challenge the young minds. It aims to challenge young minds with straightforward and few demanding questions. This list is a starting point and can act as an ideal tool to nurture the cognitive skills of sixth graders. It offers them a taste of both simplicity and complexity in problem-solving.
List of 50 Mental Ability Test Questions with Answers for Class 6
Question 1. Which number comes next in the sequence: 2, 4, 8, 16, …?
a) 24
b) 32
c) 18
d) 30
Answer:
b) 32 — The sequence is doubling each time. (2×2=4, 4×2=8, 8×2=16, so 16×2=32).
Question 2. Find the odd one out: 81, 64, 49, 36, 28
a) 81
b) 64
c) 49
d) 28
Answer:
d) 28 — All others are perfect squares (9², 8², 7², 6²), but 28 is not.
Question 3. If CAT is coded as 3120, how will DOG be coded?
a) 4157
b) 5147
c) 4175
d) 1574
Answer:
a) 4157 — Each letter is represented by its position in the alphabet. C(3), A(1), T(20); similarly, D(4), O(15), G(7).
Question 4. What comes next in the pattern: A, C, F, J, …?
a) N
b) O
c) P
d) Q
Answer:
b) O — The pattern follows the sequence of adding 1, 2, 3, 4, etc., to the position of the letter in the alphabet (A+1=B, C+2=E, F+3=I, J+4=O).
Question 5. In a row of trees, a tree is 7th from either end of the row. How many trees are there in the row?
a) 13
b) 14
c) 15
d) 12
Answer:
a) 13 — If the tree is 7th from either end, there are 6 trees on each side of it, making a total of 6+6+1=13 trees.
Question 6. If PENCIL is written as NCIEPL, how is TIGER written?
a) IETRG
b) TGIRE
c) IETGR
d) IGTER
Answer:
c) IETGR — The pattern is to reverse the first three and last three letters separately (PEN→NEP, CIL→ILC; TIG→GIT, ER→RE).
Question 7. If 1 * 2 = 21, 2 * 3 = 36, 3 * 4 = 412, what is 4 * 5?
a) 420
b) 45
c) 520
d) 54
Answer:
c) 520 — The pattern is to write the second number and then the product of both numbers (2 and 1*2=2 form 21, 3 and 2*3=6 form 36, 4 and 3*4=12 form 412; so 5 and 4*5=20 form 520).
Question 8. A clock shows 3:15. What is the angle between the hour and the minute hands?
a) 0°
b) 7.5°
c) 90°
d) 37.5°
Answer:
d) 7.5° — At 3:15, the hour hand will have moved a quarter of the way between the 3 and the 4, which is 3.75 hours. Since each hour represents 30 degrees (360 degrees / 12 hours), the hour hand is 3.75 hours × 30 degrees/hour = 112.5 degrees from the top of the clock.
The minute hand at 15 minutes is at 90 degrees (as each minute represents 6 degrees, and 15 × 6 = 90).
Therefore, the angle between the hour and minute hands is 112.5 – 90 = 22.5 degrees.
Question 9. Which number should replace the question mark in the following series: 2, 6, 12, 20, ?, 42
a) 30
b) 32
c) 28
d) 35
Answer:
a) 30 — The series is increasing by consecutive even numbers. The differences are 4, 6, 8, etc. So, 20 + 10 = 30.
Question 10. If ‘RED’ is coded as ‘574’, what will be the code for ‘GREEN’?
a) 795577
b) 975577
c) 957757
d) 977555
Answer:
b) 975577 — Each letter is assigned a number: R=5, E=7, D=4. Similarly, G=9, R=5, E=7, E=7, N=5.
Question 11. If WATER is coded as XCVHU, then how is BREAD coded?
a) DSFCU
b) CSFCU
c) DSFCB
d) ESFDU
Answer:
b) CSFCU — Each letter is replaced by the next two letters in the alphabet (W→X, A→C, etc.).
Question 12. Find the missing number: 8, 13, 20, ?, 40, 53
a) 28
b) 29
c) 30
d) 31
Answer:
b) 29 — The sequence increases by 5, 7, 9, 11, etc. So, 20 + 9 = 29.
Question 13. Complete the series: ABZ, BCY, CDX, ?
Options:
a) DEW
b) EFV
c) EFW
d) DFW
Answer:
a) DEW — The series is a sequence where each letter in the group moves one step forward and the last letter moves one step backward in the alphabet.
Question 14. In a certain code, 15789 is written as EGKPT. How is 23456 written in that code?
a) ALURV
b) BQWTY
c) ALUTY
d) BFUVO
Answer:
b) BQWTY — Each number is coded as the letter in its alphabetical position (1=A, 2=B, etc.).
Question 15. Rohan moves 5 km east, then turns left and moves 4 km, and finally turns left again and moves 5 km. In which direction is he facing now?
a) East
b) West
c) North
d) South
Answer:
d) South — Rohan is facing south after completing the movements.
Question 16. Complete the series: 11, 22, 33, 44, 55, ?
a) 66
b) 77
c) 88
d) 99
Answer:
a) 66 — The series consists of consecutive numbers repeated twice (11, 22, 33, etc.).
Question 17. If MANGO is coded as 21413 and APPLE as 161512, how is GRAPE coded?
a) 718516
b) 817516
c) 718615
d) 817615
Answer:
a) 718516 — Each letter is represented by its position in the alphabet (G=7, R=18, A=1, P=16, E=5).
Question 18. What number replaces the question mark in the following sequence: 3, 8, 15, 24, 35, ?
a) 48
b) 46
c) 49
d) 50
Answer:
a) 48 — The pattern is adding 5, 7, 9, 11, 13, etc., to the previous number.
Question 19. If RED is related to BLOOD, then GREEN is related to?
a) SKY
b) GRASS
c) SUN
d) FLOWER
Answer:
b) GRASS — Green is commonly associated with grass, just as red is associated with blood.
Question 20. Which number is the odd one out: 2, 3, 6, 7, 8, 14, 15, 30?
a) 2
b) 8
c) 14
d) 30
Answer:
b) 8 — All numbers except 8 are either prime or products of two primes.
Question 21. What is the sum of the angles of a triangle?
a) 180 degrees
b) 90 degrees
c) 360 degrees
d) 270 degrees
Answer:
a) 180 degrees — The sum of the angles in any triangle is always 180 degrees.
Question 22. If SOAP is written as 7416, how is RAIN written?
a) 9214
b) 18291
c) 18912
d) 91812
Answer:
d) 91812 — Each letter is represented by its position in the alphabet backward (S=19, O=15, A=1, P=16; 26-19=7, 26-15=11, 26-1=25, 26-16=10).
Question 23. A family has 6 sons and each son has one sister. How many people are in the family?
a) 8
b) 13
c) 7
d) 14
Answer:
a) 8 — There are the parents, 6 sons, and 1 daughter (6 sons share the same sister).
Question 24. Complete the series: Z, U, Q, ?, I
a) L
b) M
c) N
d) O
Answer:
b) M — The series is skipping 4, 3, 2, 1 letters (Z, Y, X, W, V, U; U, T, S, R, Q; Q, P, O, N, M).
Question 25. If RATION is coded as 123456, how is RATIO coded?
a) 12345
b) 12356
c) 12456
d) 12346
Answer:
a) 12345 — Each letter corresponds to a number (R=1, A=2, T=3, I=4, O=5).
Question 26. Which number is different from the rest: 124, 215, 327, 438, 551?
a) 124
b) 215
c) 327
d) 551
Answer:
d) 551 — In all other numbers, the third digit is less than the sum of the first two digits.
Question 27. If ‘MOUSE’ is related to ‘COMPUTER’, then ‘BOOK’ is related to?
a) LIBRARY
b) PAPER
c) READING
d) SHELF
Answer:
a) LIBRARY — A book is commonly found in a library, as a mouse is with a computer.
Question 28. In a certain code, TRIANGLE is written as SQHZMFKD. How is CIRCLE written in that code?
a) DBHSKD
b) DHBKJD
c) BHKDJD
d) DBJKSB
Answer:
a) DBHSKD — Each letter is replaced by the previous letter in the alphabet.
Question 29. If 5 * 9 = 2054 and 7 * 6 = 3054, then what is 8 * 4?
a) 4054
b) 5043
c) 3045
d) 4032
Answer:
c) 3045 — The pattern involves reversing the digits of the product and placing the first number at the end (5×9=45, reverse to 54, add 20; 7×6=42, reverse to 24, add 30).
Question 30. Arrange the words in a logical order: Leaf, Tree, Branch, Seed, Fruit
a) Seed, Tree, Branch, Leaf, Fruit
b) Seed, Leaf, Tree, Branch
c) Seed, Branch, Leaf, Tree, Fruit
d) Seed, Tree, Leaf, Branch, Fruit
Answer:
a) Seed, Tree, Branch, Leaf, Fruit — The logical order of growth and development of a tree.
Question 31. If in a certain language, MADRAS is coded as NBESBT, how is BOMBAY coded in that language?
a) CPNCBX
b) CPNCBZ
c) CPOCBZ
d) CPNDBZ
Answer:
b) CPNCBZ — Each letter in the word is moved one step forward to form the code.
Question 32. What comes next in the series: SCD, TEF, UGH, ?, WKL
a) CMN
b) UJI
c) VIJ
d) IJT
Answer:
c) VIJ — The series follows a pattern where each letter in the word moves one, two, and three steps forward respectively.
Question 33. If 2 * 3 = 8, 4 * 5 = 20, 6 * 7 = 42, then what is 8 * 9?
a) 56
b) 72
c) 64
d) 80
Answer:
d) 72 — The pattern is the multiplication of the two numbers plus 2 (2*3+2=8, 4*5+2=22, 6*7+2=44, so 8*9+2=72).
Question 34. In a code, ‘256’ means ‘red flower bloom’, ‘264’ means ‘flower bloom garden’, and ‘356’ means ‘beautiful red rose’. What digit in the code stands for ‘red’?
a) 2
b) 5
c) 6
d) 3
Answer:
b) 5 — ‘Red’ is the common word in ‘256’ and ‘356’, thus represented by 5.
Question 35. If Monday is to January, then Wednesday is to?
a) March
b) May
c) July
d) August
Answer:
b) May — Both Monday and January are the first in their categories (week and year), Wednesday and May are the third.
Question 36. Find the group that is different:
a) EGIK
b) FHJL
c) BDFH
d) ACDF
e) JLNP
Answer:
d) ACDF — All others are sequences of letters with equal intervals, except ACDF.
Question 37. Find the group that is different:
a) XZBF
b) RUTW
c) KMOQ
d) GIKM
e) PSVX
Answer:
b) RUTW — All others follow a sequence with equal intervals between each letter, RUTW does not.
Question 38. Find the odd one out:
a) ZABY
b) VEWU
c) QJSR
d) NOLM
e) TGFH
Answer:
e) TGFH — In all others, the first and last letters are consecutive, but not in TGFH.
Question 39. Find the group that is different:
a) OQST
b) EGIK
c) UWXZ
d) ACDF
e) JLNP
Answer:
a) OQST — All others are sequences of letters with equal intervals, OQST is not in equal interval.
Question 40. Find the odd one out:
a) BDFH
b) KMNP
c) RTVX
d) PSVX
e) EGJL
Answer:
d) PSVX — In all others, each letter is two steps from the next
Question 41. Find the group that is different:
a) JLNQ
b) DGJM
c) TWXZ
d) CEHG
e) BDFI
Answer:
d) CEHG — In all other groups, there is a consistent two-letter interval between each letter, but in CEHG the intervals vary.
Question 42. Find the odd one out:
a) NOPQ
b) YZAB
c) VWXY
d) CDEF
e) STUV
Answer:
c) VWXY — All others are sequences starting from the beginning of the alphabet, but VWXY starts from the end.
Question 43. Fill in the missing letters: a_c_e_g_?
Options:
a) bdfh
b) bdgh
c) bdfi
d) bdgi
Answer:
a) bdfh — The letters are in alphabetical order with one letter skipped each time.
Question 44. Fill in the missing letters: _abc_a_bc_ab_
Options:
a) bcaac
b) acbac
c) bacab
d) cbaab
Answer:
b) acbac — The pattern is a cyclic repetition of ‘abc’.
Question 45. Find the missing letters: J_KMN_O_?
Options:
a) KLOP
b) LLOP
c) KLMO
d) KLLP
Answer:
a) KLOP — The letters are in alphabetical order, with one letter skipped each time.
Question 46. Complete the series: ZYX, WVU, TSR, ?
Options:
a) QPO
b) QPN
c) QPM
d) QPL
Answer:
a) QPO — The series is a sequence of reverse alphabets in groups of three, skipping one letter each time.
Question 47. Find the missing letters: _b_cd_bc_d_
Options:
a) acbb
b) abcc
c) bacc
d) bbca
Answer:
d) bbca — The letters alternate between ‘b’ and ‘c’, starting with ‘b’.
Question 48. Complete the sequence: BDF, HJL, NPR, ?
Options:
a) TVX
b) TUX
c) SUV
d) STV
Answer:
a) TVX — Each group skips one letter and then two letters alternately.
Question 49. Fill in the blanks: a_b_c_bca_?
Options:
a) cbab
b) acba
c) baca
d) abcb
Answer:
c) baca — The letters form a repeating pattern of ‘abc’.
Question 50. Find the odd one out:
a) AEIM
b) BFJN
c) CGKO
d) DHLP
e) EJOT
Answer:
e) EJOT — In all other groups, each letter is one step apart in the alphabet, but in EJOT, the letters are not in a consistent one-step sequence.