Question

Look at the numbers in the table and find the missing number in the riddle.

Answer 1

The answer is 98
See the logic:
(3*2) + (2 -1) = 7
(5*4) + (4 - 1) = 23
(7*6) + (6 -1) = 47
(10*9) + (9-1) = 98

Answer 2

Ans is 97
(3*2)+1=7
(5*4)+3=23
(7*6)+5=47
(10*9)+7=97

Answer 3

Two answers are possible 98 or 97
For answer 98 :-
C3 = (C1 * C2) + (C2 - 1)
First row :- (3 * 2) + (2 - 1) = 6 + 1 = 7
Second row :- (5 * 4) + (4 - 1) = 20 + 3 = 23
Third row :- (7 * 6) + (6 - 1) = 42 + 5 = 47
Fourth row :- (10 * 9) + (9 - 1) = 90 + 8 = 98
For answer 97 :-
(3 * 2) + 1 = 7
(5 * 4) + next odd number after 1 = 20 + 3 = 23
(7 * 6) + next odd number after 3 = 42 + 5 = 47
(10 * 9) + next odd number after 5 = 90 + 7 = 97

Answer 4

The logic followed in the given equations are as follows;

R1 x R2 + (R2 – 1) = R3

So if we apply this in the given table, you will see;
3 x 2 + (2 – 1) = 6 + 1 = 7

Similarly for other rows we can solve the equation as;

5 x 4 + (4 – 1) = 20 + 3 = 23

7 x 6 + (6 – 1) = 42 + 5 = 47

9 x 8 + (8 – 1) = 72 + 7 = 79

Therefore we can find the missing number as;

10 x 9 + (9 – 1) = 90 + 8 = 98
Answer = 98

Answer 5

ans is 97
the logic is
3*2+1=7
5*4+3=23
7*6+5=47
10*9+7=97

Answer 6

ANS------------------ 98

Answer 7

Both logics being good 98 looks more reasonable