Question

Which number should be placed at the sign of interrogation?

• A. 20
• B. 25
• C. 26
• D. 75

Answer 1

The correct option is C 26

In the first figure, $2^2$ + $4^2$ = 20
In the second figure, $3^2$ + $9^2$ = 90
$\therefore$ In the third figure, $1^2$ + $5^2$ = 26
Hence, the correct answer is (C)