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: C
Explanation
First row:
3 × 5 × 6 = 90
Second row:
2 × 4 × 5 = 40
First number × Second number × Third number
Now third row:
4 × 7 × ? = 140
First do 4 × 7:
4 × 7 = 28
Now
28 × ? = 140
So
? = = 5
Correct answer: 5