


21. Find the odd man out. $3,8,18,38,78,158,316$ | |
A. $38$ | B. $158$ |
C. $8$ | D. $316$ |
Discuss |
Answer: Option D
Explanation:
$3×2+2=8\\8×2+2=18\\18×2+2=38\\38×2+2=78\\78×2+2=158\\158×2+2=318$
Therefore, $318$ should have come in place of $316$
22. Find the odd man out. $5,6,14,45,185,925,5556$ | |
A. $925$ | B. $6$ |
C. $5556$ | D. $185$ |
Discuss |
Answer: Option D
Explanation:
$5×1+1=6$
$6×2+2=14$
$14×3+3=45$
$45×4+4=184$
$184×5+5=925$
$925×6+6=5556$
Therefore, $184$ should have come instead of $185$
23. Find the odd man out. $23,27,36,52,77,111,162$ | |
A. $111$ | B. $27$ |
C. $52$ | D. $162$ |
Discuss |
Answer: Option A
Explanation:
$23+2^2=27\\27+3^2=36\\36+4^2=52\\52+5^2=77\\77+6^2=113\\113+7^2=162$
Hence, $113$ should have come in place of $111$
24. Find the odd man out. $241,263,248,271,255,277,262$ | |
A. $263$ | B. $241$ |
C. $277$ | D. $271$ |
Discuss |
Answer: Option D
Explanation:
$241+22=263\\263-15=248\\248+22=270\\270-15=255\\255+22=277\\277-15=262$
Therefore, $270$ should have come in place of $271$
25. Find the odd man out. $125,127,130,135,142,153,165$ | |
A. $165$ | B. $142$ |
C. $153$ | D. $130$ |
Discuss |
Answer: Option A
Explanation:
Prime numbers $2,3,5,7,11,13$ are added successively. Hence, $165$ is wrong.