Directions: Each of the questions given below is followed by series of options among which you have to choose the best one. You can also review your choices by clicking into answer section.
1. Find the odd man out. 1, 8, 27, 64, 125, 196, 216, 343
A. 64
B. 196
C. 216
D. 1
Answer
Explanation:
The pattern is 13, 23, 33, 43, 53, 63, 73.
196 is not a perfect cube
2. 10, 25, 45, 54, 60, 75, 80
A.10
B.45
C.54
D.75
Answer
Explanation:
Each of the numbers except 54 is multiple of 5.
3. Find the odd man out. 30, -5, -45, -90, -145, -195, -255
A. -5
B. -145
C. -255
D. -195
Answer
Explanation:
30
30 – 35 = -5
-5 – 40 = -45
-45 – 45 = -90
-90 – 50 = -140
-140 – 55 = -195
-195 – 60 = -255
Hence, -145 is wrong. -140 should have come in place of -145
4. 2, 5, 10, 17, 26, 37, 50, 64
A.50
B.26
C.37
D.64
Answer
Explanation:
(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1
But, 64 is out of pattern.
5. Find the odd man out. 12, 21, 32, 45, 60, 77, 95
A. 95
B. 45
C. 32
D. 21
Answer
Explanation:
12 + 9 = 21
21 + 11 = 32
32 + 13 = 45
45 + 15 = 60
60 + 17 = 77
77 + 19 = 96
Hence, 95 is wrong. 96 should have come in place of 95.
6. 835, 734, 642, 751, 853, 981, 532
A.751
B.853
C.981
D.532
Answer
Explanation:
In each number except 751, the difference of third and first digit is the middle one.
7. Find the odd man out. 241, 263, 248, 271, 255, 277, 262
A. 277
B. 271
C. 263
D. 241
Answer
Explanation:
Alternatively 22 is added and 15 is subtracted from the terms. Hence, 271 is wrong
241
241 + 22 = 263
263 – 15 = 248
248 + 22 = 270
270 – 15 = 255
255 + 22 = 277
277 – 15 = 262
8. 1, 4, 9, 16, 20, 36, 49
A.1
B.9
C.20
D.49
Answer
Explanation:
The pattern is 12, 22, 32, 42, 52, 62, 72. But, instead of 52, it is 20 which to be turned out.
9. Insert the missing number: 2, 6, 12, 20, 30, 42, 56, (…..)
A 60
B. 64
C. 72
D. 70
Answer
Explanation:
The pattern is 1 × 2, 2 × 3, 3 × 4, 4 × 5, 5 × 6, 6 × 7, 7 × 8.
So, the next numbers is 8 × 9 = 72.
10. Find the wrong number 52, 51, 48, 43, 34, 27, 16
A.27
B.34
C.43
D.48
Answer
Explanation:
Subtract 1, 3, 5, 7, 9, 11 from successive numbers.
So, 34 is wrong.
11. Find the odd man out:
A 671
B. 462
C. 427
D. 264
Answer
Explanation:
In each number except 427, the middle digit is the sum of other two.
12. Find the wrong number 46080, 3840, 384, 48, 24, 2, 1
A.1
B.2
C.24
D.384
Answer
Explanation:
The terms are successively divided by 12, 10, 8, 6, …etc.
So, 24 is wrong, it should be 8 (48/6 = 8).
13. Find the wrong number 36, 54, 18, 27, 9, 18.5, 4.5
A.4.5
B.18.5
C.54
D.18
Answer
Explanation:
The terms are alternatively multiplied by 1.5 and divided by 3. However, 18.5 does not satisfy it.
14. Insert the missing number 2, 4, 12, 48, 240, (….)
A.960
B.1440
C.1080
D.1920
Answer
Explanation:
Go on multiplying the given numbers by 2, 3, 4, 5, 6.
So, the correct next number is 1440.
15. Insert the missing number 11, 13, 17, 19, 23, 29, 31, 37, 41, (….)
A.43
B.47
C.53
D.51
Answer
Explanation:
Numbers are all primes. The next prime is 43.
