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MD Azad

· started a discussion

· 1 Months ago

Reasoning problem (Question: 176791.0 )

I think this question logic should be +1,+3,+6,+9,+12.

Question:
DIRECTIONS: Complete the following series: 

5, 6, 9, 15, ?, 40
Options:
A) 27
B) 21
C) 33
D) 25
Solution:
Ans: (d) The given sequence follows the pattern:

+1, +3, +6, +15.

i.e. +1; + (1 + 2); + (1 + 2 + 3); 

+(1+2+3+4);+(1 +2+3+4+5).


Therefore, Missing term = 15 + (1 +2 + 3 +4) = 25.

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