Question

6 3 21
7 3 24
8 4 36
9 4 40
10 5 ?solve this puzzle

Answer 1

There's a clear pattern visible,

just ignore the first digits, you will find,

3 × 7 = 21

3 × 8 = 24

4 × 9 = 36

4 × 10 = 40

here , a pattern of consecutive numbers being multiplied is seen,

therefore,

10 , 5 ,?
will be

5 × 11 = 55

55 is the answer.

OR

when the middle term is 3,3 is added

6 × 3 + 3 = 21
7 × 3 + 3 = 24

when middle term is 4,4 is added

8 × 4 + 4 = 36
9 × 4 + 4 = 40

similarly,
when middle term is 5 , 5 will be added

10 × 5 + 5 = 55

Answer 2

55 is the answer isn't it