Question

5,7=31, 8,7=81, 8,9=72, 7,7=?

Answer 1

Answer:

7,7=49

Step-by-step explanation:

5x7=31,8x7=81,8x9=72,7x7=49

Answer 2

Answer:

Answer is 97

Step-by-step explanation:

We are given,

5 , 7 , ( 31 )

8 , 3 , ( 81 )

8 , 9 , ( 72 )

To find: 7 , 7 , ( ? )

We see given numbers follow some pattern which is given below

A). ( 3 + 1 ) - ( 7 - 5 ) = 4 - ( 2 ) = 2

B). ( 8 + 1 ) - ( 8 - 3 ) = 9 - ( 5 ) = 4

C). ( 7 + 2 ) - ( 9 - 8 ) = 9 - ( 1 ) = 8

D). Say, the sum of digits of two digit number be x

      x - ( 7 - 7 ) = 16

       x = 16

So, we check which two digits sum is 16.

We get, 97 or 88 or 79.

Therefore, Answer is 97