Question

Solve for ?
5,7, 31,8,3,81,9,8,72,7,7,?

Answer 1

Answer :

Hey Mate,

Given Puzzle : 5,7 = (31) ; 8,3 = (81) ; 9,8 = (72) ; 7,7 = (X)

Solution :

1 : 5, 7 = 31

5 (Odd), 7 (Odd) = 3 (Odd) , 1 (Odd)

2 : 8, 3 = 81

8 (Even), 3 (Odd) = 8 (Even) , 1 (Odd)

3 : 9, 8 = 72

9 (Odd), 8 (Even) = 7 (Odd) , 2 (Even)

So, Next Number should be  (Odd), (Odd)

4 : 7, 7 = X

If u have option of this question, then find out option which have both Odd digits.

So, The answer is 97.

Answer 2

Given :  A circle with numbers

5*7=31, 8*3=81, 9*8=72, 7*7=?​

To Find :  Missing number

A) 97

B) 87

C) 82

D) 45

Solution:

5  7    31

 5     7         3        1

odd odd    odd   odd

8 3    81

8           3         8       1

Even  Odd     Even   Odd

9 8    72

9           8          7       2

Odd   Even      Odd  Even

7   7      ?

 7     7         ?        ?

odd odd    odd   odd

only option odd  odd  is  97

Hence 97 is the correct answer

Also

Left Side circle

Sum of digit  = 5 + 7 + 3 + 1  + 7 + 7 + 9 + 7 = 46

Right Side circle

Sum of digit  = 8+ 3+ 8 + 1  + 9 + 8 + 7 + 2  = 46

46 = 46

97 is the correct answer

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