**90% Fail To Answer : If 1+5=18, 2+10=36, 3+15=54 then, 4+20=?**

Solve If You Are A Genius!

Solve If You Are A Genius!

1 + 5 = 18

2 + 10 = 36

3 + 15 = 54

4 + 20 = ?

Solve this math problem to see answer.

The logic in this mathematical puzzle is as follows:

Add the numbers and then multiply it by 3.

So, putting this into the equations,

1 + 5 = (1 + 5) x 3 = 6 x 3 = 18

2 + 10 = (2 +10) x 3 = 12 x 3 = 36

3 + 15 = (3 + 15) x 3 = 18 x 3 = 54

Therefore,

4 + 20 = (4 + 20) x 3 = 24 x 3 = 72

Hence, the correct answer =

72

**Puzzles**category and tagged with

**number puzzle**

**puzzle online**

**puzzle with answers**

**mind puzzles**

**brain teasers**

**90 fail to answer**

**maths puzzles**