# Math riddles Level 18 Answer with Hints and solutions

Math riddles game level 18 Answer with solution android game developed by Black games. Scroll Below to find details.

Math Riddles tests your IQ with mathematical puzzles. Challenge yourself with different levels of math puzzles and stretch the limits of your intelligence. Every IQ game is prepared with an approach of an IQ test. Improve your mathematics, challenge your brain with this game. There are many hard levels which you may not have solved then you can take help from here.

## Click Here for All MATH RIDDLES Levels Answers

**Math app level 18**:

7, 15, 31, ?

**Answer**: 63

**Solution**: 8-1, 16-1, 32-1, 64-1

If there is any Doubt/discrepancy then please let me know in comments or you are unable to understand solution then I will surely help you.

7×2+1=15

15×2+1=31

31×2+1=63

Hi there! Could someone explain me why we have to subtract 1? Thank you beforehand!

Come on

7+8 = 15

15+8×2 = 31

31+8×3 /=/ 55

True