Question

5 6 12 42
7 5 7 42
3 4 10 22
5 ? 12 32
(a) 3
(c) 5
(b) 4
(d) 6​

Answer 1

Explanation:

(5*6)+12=42

(7*5)+7=42

(3*4)+10=22

(5*x)+12=32

=>5*x=20

=>x =4