This **math trick** will floor you. Compound interest maths problems solves our daily life’s practical problems. For example , world over people are interested to know how his or her money grew in bank which offers , among many other products, term deposits or fixed deposits which carry compounded interest.One of the very common question by a person may **” if my miney grows at this interest rate by bank by two times in 6 years, in how many will it grow to 4times?. **

*Do not worry , there is a mth trick to solve such common math problems.*Using this math trick, questions like this can be solved aby any one in a minute, if by some practice without even using any pen or paper. For example , say the problem is [box type=”info”] **If a sum becomes 4 times in 6 years, in how many years , will it became 8 times? The answer is 1.5 x 6= 9 years How did I find the answer?**[/box]

## The Math Trick on Compounding Problems

Formula is

if a sum becomes x times in y years, then on same interest, it will become [latex]X^n[/latex] in NY years. That’s it !

**Let us apply the trick to the aforesaid problem**

X = 4 times

Y= 6 years

So as per formula, it wll by[latex] x^n[/latex] in nY years

In other words, [latex]x^n[/latex] = 8 times ( given in the problem itself)

[latex]4^n[/latex]=8;

So [latex]4^1×4^frac{1}{2}[/latex]=8;

so [latex]4^1 x 4^1/2=8[/latex]

so [latex]4^1frac{1}{2}=8[/latex]

So N =[latex] 1frac{1}{2}=1.5[/latex]

So the Answer is NY years i.e 1.5 x 6 = 9 years

### Now Practice about the math trick on compounding problem

## Compounding Problems in Math

*Compounding Problems in Math*.

**You scored %%SCORE%% out of %%TOTAL%%.**Your performance has been rated as %%RATING%%

Question 1 |

**If 100 becomes 200 in 4 years, how many years will it take to become 800?**

9 | |

12 | |

8 | |

10 |

**This answer is NY years = 3 x 4 = 12**years

Question 2 |

**If a sum deposited at compound interest becomes twice in four years,when will it become 4 times?**

6 | |

7 | |

4 | |

8 |

**This answer is NY years = 4 x 2 = 8**years

Question 3 |

**100 become 300 in 3 years. In how many years, will it become 9 times?**

4 | |

6 | |

8 | |

9 |

**This answer is NY years = 3 x 2 = 6**years

This was part 1 of *math trick* problem solution.