Question

5,7,(31), 8,3,(81),8,9,(72),7,7,(?

Answer 1

Answer:

5,7,(31),8,3,(81),8,9,(72),7,7,(98)

Answer 2

Answer:

Our answer is 97

Step-by-step explanation:

We are given,

5 , 7 , ( 31 )

8 , 3 , ( 81 )

8 , 9 , ( 72 )

We need to find 7 , 7 , ( ? )

Following is the pattern followed in above series.

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

2nd). ( 8 + 1 ) - ( 8 - 3 ) = 9 - ( 5 ) = 4

3rd). ( 7 + 2 ) - ( 9 - 8 ) = 9 - ( 1 ) = 8

4th). let x be the sum of digits of two digit number

       x - ( 7 - 7 ) = 16

       x = 16

So, we check which two digits sum is 16.

We get, 97 or 88 or 79.

Therefore, Our answer is 97