## Number Puzzle #173

2 6 18

4 20 100

X 21 147

find X

Check your answer:-

**Answer**: X = 3

**Solution**

in first row next number is a multiplication of 3 and the previous number

second row, next number is a multiplication of 5 and the previous number

in third row 3rd number (147) is a multiplication of 7 and previous number, i.e. 21, thus X*7 = 21 =>

**x = 21/7 = 3**