Question

If $m ^ { t h }$ terms of the series and $3 + 10 + 17 + 24 + \ldots \ldots$ be equal, then $m =$

• A. 11
• B. 12
• C. 13
• D. 15

Answer 1

Answer: (C)

13

Answer 2

Given series $63 + 65 + 67 + 69 + \ldots \ldots$ …..(i)

and $3 + 10 + 17 + 24 + \ldots \ldots$ ….. (ii)

Now from (i), term $= ( 2 m + 61 )$ and term of (ii) series $= ( 7 m - 4 )$

Under condition,

$\Rightarrow 7 m - 4 = 2 m + 61 \Rightarrow 5 m = 65 \Rightarrow m = 13$.