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

**Problem**

**Problem**

If Mira was twice as heavy as she is, she would be 10 lbs lighter than her mother; if she were to lose 10 lbs, she would be 75% of her present weight. How much does Mira’s mother weigh?

- 60 lbs
- 70 lbs
- 80 lbs
- 90 lbs
- 100 lbs

**The Usual Method**

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Let the weight of Mira be ‘*x*’ years and that of her mother be ‘*y*’ years.

Hence,

…… Eq. 1

and …… Eq. 2

From Eq. 2,

90 lbs

**(Ans: 4)**

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

**Using Technique**

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If 10 lbs is reduced from a weigh, than it becomes 75% of the original. Thus the reduction of 10 lbs is equivalent to 25%. Hence 100% is equal to 40 lbs. Thus Mira’s weight is 40 lbs and her mother’s weight is 90 lbs.

**(Ans: 4)**

*Estimated Time to arrive at the answer = 15 seconds.*

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