1) 88 , 64 , 24 , ?

1 term = 64

2 term = 8 * 8 = 64

3 term = 6 * 4 = 24

4 term = 2 * 4 = 8

First of all we add the first 3 numbers like :

1 + 3 + 4 = 8

3 + 4 + 8 = 15

4 + 8 + 15 = 27

8 + 15 + 27 = 50

Calculate the difference between the numbers :

7 - 2 , 17 - 7 , 32 - 17 , 52 - 32 , 77 - 52 , ? - 77

5 , 10 , 15 , 20 , 25 , ?

As we see there is sequence in differences where 5 is added in previous number and we get the next number :

5 , 10 , 15 , 20 , 25 ,

Now lets add

77 + 30 = 107

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