Question

what is place of ? is

Answer 1

$\textbf{\underline{Answer :-}}$

The value of ? in the given question is 21

$\textbf{\underline{Logic :-}}$

The first number is added by the second number and then 1 is substracted from the sum done previously, to get the third number.

$\textbf{\underline{Explanation :-}}$

$\tt{\implies15 + 8 = 23 \: {\rightarrow 23 - 1 = 22}}$

$\tt{\implies17 + 12 = 19 \: {\rightarrow19 - 1 = 18}}$

According to the above logic the answer is :

$\tt{\implies13 + 9 = 22 \: {\rightarrow22 - 1 = 21}}$

Therefore the number which replaces the ? in the question is 21

Answer 2

21 is the right answer...

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