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Question


Find the next number in the sequence: 6, 11, 16, 21


Options:
A .   30
B .   25
C .   26
D .   31
Answer: Option C
:
C
The sequence follows: 6, 11, 16, 21
Starting from the left
6 = ( 5 × 1 ) + 1
11 = ( 5 × 2 ) + 1
16 = ( 5 × 3 ) + 1
21 = ( 5 × 4 ) + 1
Each term is one more than the the corresponding multiple of 5.
So, the next term will be 
( 5 × 5 ) + 1 = 26

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