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Solved Examples(Set 4) - Series - Odd Man Out

16. Find the odd man out. $1,16,81,255,625,1296$
A. $1296$B. $81$
C. $1$D. $255$
Discuss
answer with explanation

Answer: Option D

Explanation:

The pattern is $1^4,2^4,3^4,4^4,5^4,6^4$

But $255$ is given in place of $4^4$

17. Find the odd man out. $6,13,18,25,30,37,40$
A. $25$B. $30$
C. $37$D. $40$
Discuss
answer with explanation

Answer: Option D

Explanation:

The difference between two successive terms from beginning are $7,5,7,5,7,5$

Hence, in place of $40,$ right number is $37+5=42$

18. Find the odd man out. $445,221,109,46,25,11,4$
A. $221$B. $25$
C. $46$D. $109$
Discuss
answer with explanation

Answer: Option C

Explanation:

$\dfrac{445-3}{2}=221\\\dfrac{221-3}{2}=109\\\dfrac{109-3}{2}=53\\\dfrac{53-3}{2}=25\\\dfrac{25-3}{2}=11\\\dfrac{11-3}{2}=4$

Therefore, $53$ should have come in place of $46$

19. Find the odd man out. $1050,510,242,106,46,16,3$
A. $510$B. $1050$
C. $106$D. $46$
Discuss
answer with explanation

Answer: Option C

Explanation:

$\dfrac{1050-30}{2}=510\\\dfrac{510-26}{2}=242\\\dfrac{242-22}{2}=110\\\dfrac{110-18}{2}=46\\\dfrac{46-14}{2}=16\\\dfrac{16-10}{2}=3$

Therefore, $110$ should have come in place of $106$

20. Find the odd man out. $2,3,5,9,12,17,23$
A. $12$B. $2$
C. $23$D. $9$
Discuss
answer with explanation

Answer: Option D

Explanation:

$2+1=3\\3+2=5\\5+3=8\\8+4=12\\12+5=17\\17+6=23$

Therefore, $8$ should have come in place of $9$

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