In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.
Show answer & explanation
Correct answer: B
Explanation
Column = (Top number × Middle number × Bottom number) + Middle number
First column
6 × 2 × 3 = 36
36 − 1 = 35
Second column
2 × 5 × 4 = 40
40 − 1 = 39
Third column
8 × ? × 2
Bottom result = 63
8 × ? × 2 − 1 = 63
16 ? − 1 = 63
16 ? = 64
? = 4