Question

1+4=5, 2+5=12,3+6=21, then what is the answer of 6+9​

Answer 1

1 + 4 = 5

2 + 5 = 12

3 + 6 = 21

6 + 9 = 60

Every number is obtained by Multiplying the two numbers and then adding the first number to it , 9 x 6 = 54 + 6 = 60

Answer 2

Answer:

here the trend followed is

x+ y ===> xy + x ===> x(1+y)

therefore now===> 6+9===> 6×(9+1) ===> 6 × 10 = 60 is the required answer