Q 1-Find the odd man out. 6, 13, 18, 25, 30, 37, 40

A - 40

B - 30

C - 37

D - 25

Answer - A Explanation "The difference between two successive terms from the beginning are 7, 5, 7, 5, 7, 5 Hence, in place of 40, right number is 37+5=42 "

Q 2-Find the odd man out. 445, 221, 109, 46, 25, 11, 4

A - 25

B - 109

C - 46

D - 221

Answer - C Explanation "To obtain next number, subtract 3 from the previous number and divide the result by 2 445 (445-3)/2 = 221 (221-3)/2 = 109 (109-3)/2 = 53 (53-3)/2 = 25 (25-3)/2 = 11 (11-3)/2 = 4 Clearly, 53 should have come in place of 46 "

Q 3-Find the odd man out. 1050, 510, 242, 106, 46, 16, 3

A - 46

B - 106

C - 510

D - 1050

Answer - B Explanation "1050 (1050 - 30)/2 = 510 (510 - 26)/2 = 242 (242 - 22)/2 = 110 (110 - 18)/2 = 46 (46- 14)/2 = 16 (16- 10)/2 = 3 Hence, 110 should have come in place of 106 "

Q 4-Find the odd man out. 2, 3, 5, 9, 12, 17, 23

A - 12

B - 9

C - 23

D - 2

Answer - B Explanation "2 2 + 1 = 3 3 + 2 = 5 5 + 3 = 8 8 + 4 = 12 12 + 5 = 17 17 + 6 = 23 ie, 8 should have come in place of 9"

Q 5-Find the odd man out. 3, 8, 18, 38, 78, 158, 316

A - 38

B - 158

C - 316

D - 8

Answer - C Explanation "3 3 × 2 + 2 = 8 8 × 2 + 2 = 18 18 × 2 + 2 = 38 38 × 2 + 2 = 78 78 × 2 + 2 = 158 158 × 2 + 2 = 318 Hence, 316 is wrong and 318 should have come in place of that"

Q 6-Find the odd man out. 5, 6, 14, 45, 185, 925, 5556

A - 5556

B - 925

C - 185

D - 6

Answer - C Explanation "5 × 1 + 1 = 6 6 × 2 + 2 = 14 14 × 3 + 3 = 45 45 × 4 + 4 = 184 184 × 5 + 5 = 925 925 × 6 + 6 = 5556 Hence, it is clear that 184 should have come instead of 185"

Q 7-Find the odd man out. 23, 27, 36, 52, 77, 111, 162

A - 162

B - 111

C - 52

D - 27

Answer - B Explanation "23 + 2² = 27 27 + 3² = 36 36 + 4² = 52 52 + 5² = 77 77 + 6² = 113 113 + 7² = 162 Hence, 113 should have come in place of 111"

Q 8-Find the odd man out. 241, 263, 248, 271, 255, 277, 262

A - 277

B - 271

C - 263

D - 241

Answer - B Explanation "241 241 + 22 = 263 263 - 15 = 248 248 + 22 = 270 270 - 15 = 255 255 + 22 = 277 277 - 15 = 262 Alternatively 22 is added and 15 is subtracted from the terms. Hence, 271 is wrong"

Q 9-Find the odd man out. 125, 127, 130, 135, 142, 153, 165

A - 165

B - 142

C - 153

D - 130

Answer - A Explanation "Prime numbers 2, 3, 5, 7, 11, 13 are added successively. Hence, 165 is wrong"

Q 10-Find the odd man out. 5, 10, 40, 81, 320, 640, 2560

A - 40

B - 81

C - 320

D - 2560

Answer - B Explanation "Alternatively 2 and 4 are multiplied with the previous terms 5 5 × 2 = 10 10 × 4 = 40 40 × 2 = 80 80 × 4 = 320 320 × 2 = 640 640 × 4 = 2560 Hence, 81 is wrong. 80 should have come in place of 81."

Q 11-Find the odd man out. 12, 21, 32, 45, 60, 77, 95

A - 95

B - 45

C - 32

D - 21

Answer - A 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 "

Q 12-Find the odd man out. 3, 5, 15, 75, 1120, 84375

A - 84375

B - 1120

C - 15

D - 3

Answer - B Explanation "Pattern : 1st * 2nd = 3rd, 2nd * 3rd = 4th, etc. 3 5 3 × 5 = 15 5 × 15 = 75 15 × 75 = 1125 75 × 1125 = 84375 Hence, 1120 is wrong. 1125 should have come in place of 1120"

Q 13-Find the odd man out. 3576, 1784, 888, 440, 216, 105, 48

A - 105

B - 216

C - 888

D - 1784

Answer - A Explanation "3576 (3576-8)/2 = 1784 (1784-8)/2 = 888 (888-8)/2 = 440 (440-8)/2 = 216 (216-8)/2 = 104 (104-8)/2 = 48 Hence, 105 is wrong. 104 should have come in place of 105"

Q 14-Find the odd man out. 30, -5, -45, -90, -145, -195, -255

A - -5

B - -145

C - -255

D - -195

Answer - B 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"

Q 15-which is odd 253,136,352,460,324,631,244

A - 136

B - 460

C - 244

D - 324

Answer - D Explanation "253=2+5+3=10 136=1+3+6=10 352=3+5+2=10 460=4+6+0=10 324=3+2+4=09 631=6+3+1=10 244=2+4+4=10"