Question

4*6=72 ;81*5=225;9*?=147​

Answer 1

4*6 =72 : 81*5=225 : 9*16 =144 not 147 it's wrong

Answer 2

Here, a^(1/2) * b^2 will give the result. In first case a is 4 and b is 6. So, a^(1/2)=2 & b^2=36. So in this case result is 72. Similarly it goes in second case. In third case, 9^(1/2) * 7^2 = 147
So, answer here is 7