Question

Find the missing number:
2
6
18
4 20 100
?
21
147​

Answer 1

Answer:

3

Step-by-step explanation:

In the series 2 6 18

=> 2*3 = 6 & 6*3 = 18

ll'y in the series 4 20 100

=> 4*5 =20 & 20*5 =100

And difference between both series multiplications is 5 - 3 = 2

=> we will add this 2 to pervious one

i.e 5 + 2 =7

When we observe the series ? 21 147

21*7 =147

So, ? * 7 =21

=> ? = 21 / 7

=> ? = 3