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

**Problem**

**Problem**

20 years ago my age was 1/3^{rd} of my present age. What is my present age now?

- 66 years
- 36 years
- 33 years
- 30 years
- None of these

**The Usual Method**

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Let the present age be ‘*x*’ years.

Hence, 20 years ago the age was (*x* – 20) years. Also this age is 1/3^{rd} of the present age.

Hence,

years

**(Ans: 4)**

*Estimated Time to arrive at the answer = 30 seconds.*

**Using Technique**

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Note that if, the age 20 years ago was 1/3^{rd} of the present age, than 20 years represents 2/3^{rd} of the present age. Hence, present age = 30 years.

**(Ans: 4)**

*Estimated Time to arrive at the answer = 5 seconds.*

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