2 3 6 15 _________________ 157.5 630

this question is time consuming to find out the series in one go

but with practice we can succeed. Actually this question has two multiple series going on .

firstly of 0.5 multiplication but those 1.5 are incrementing by 1 and then multiplying.

Secondly , we are multiplying by natural number 1 ,2 ,3 ………

So our answer comes as

2 * 1.5 = 3

3 * 2 = 6

6 * 2.5 = 15

15 * 3 = 45

45 * 3.5 = 157.5

157.5 * 4 = 630

So , the answer is 45.

this question is time consuming to find out the series in one go

but with practice we can succeed. Actually this question has two multiple series going on .

firstly of 0.5 multiplication but those 1.5 are incrementing by 1 and then multiplying.

Secondly , we are multiplying by natural number 1 ,2 ,3 ………

So our answer comes as

2 * 1.5 = 3

3 * 2 = 6

6 * 2.5 = 15

15 * 3 = 45

45 * 3.5 = 157.5

157.5 * 4 = 630

So , the answer is 45.