Here’s and example of a **SMART MATH** problem for **PERCENTAGES.**

**Problem**

**Problem**

The annual increase in population of a town is 5% If the present population is 70560, what was it two years ago?

- 64000
- 64500
- 66000
- 66500
- 67000

**The Usual Method**

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Let the population of the town two years ago be ‘*x*’.

Hence, population now will be:

**(Ans: 1)**

*Estimated Time to arrive at the answer = 45 seconds.*

**Using Technique**

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The two 5% increases can be looked at approximately 10% increase. Reducing 10% from 70560, we get: 70560 – 7056 = 63560 which is closest to 64000. Hence option ‘1’.

**(Ans: 1)**

*Estimated Time to arrive at the answer = 10 seconds.*

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