Given Sara's age today to be $y$ years. Think of her age in the future or in the past. What will the following expression indicate? $y + 7, y - 3, y + 4 \frac{1}{2}, y - 2 \frac{1}{2}$ .

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Solution

$y =$ Sara's present age
then,
$y + 7 =$ Sara's age after seven years
$y - 3 =$ Sara's age before three years
$y + 4 \frac{1}{2} =$ Sara's age after four and half years
$y - 2 \frac{1}{2} =$ Sara's age before two and half years

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Question 3(b)

Given Sara’s present age today is y years. Think of her age in the future or in the past. What will the following expression indicate?

$y + 7, y - 3, y + 4 \frac{1}{2}, y - 2 \frac{1}{2}$

Question 3(b)

Given Sara’s present age today is y years. Think of her age in the future or in the past. What will the following expression indicate?

$y + 7, y - 3, y + 4 \frac{1}{2}, y - 2 \frac{1}{2}$

(a) Given Munnu’s age to be x years, can you guess what (x − 2) may show?

(Hint: Think of Mannu’s younger brother.)

Can you guess what (x + 4) may show? What (3x + 7) may show?

(b) Given Sara’s age today to be y years. Think of her age in the future or in the past.

What will the following expression indicate?

(c) Given n students in the class like football, what may 2n show? What may show? (Hint: Think of games other than football).

y

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