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: D
Explanation
First row:
(4 × 7 × 5) − 10
= 140 − 10
= 130
Third row:
(8 × 4 × 5) − 10
= 160 − 10
= 150
Rule: (1st × 2nd × 3rd) − 10
Second row:
(? × 5 × 2) − 10 = 70
10? − 10 = 70
10? = 80
? = 8