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# Q.3 (a) Given Mannu’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 now? 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? y + 7, y – 3, y + $$4\frac{1}{2}$$ , y – $$2\frac{1}{2}$$ . (c) Given n students in the class like football, what may 2n show? What may $$\frac{n}{2}$$ show? (Think of games other than football).

(a) Given that Mannu’s age = x years.
$$\therefore$$ (x -2) years may be the age of her younger brother or younger sister.
(x + 4) years show the age of her elder brother or elder sister.
(3x + 7) years may be the age of her father, mother or uncle.
(b) y represents the age of Sara in years.
$$\therefore$$ y + 7 shows her future age.
y – 3 shows her past age.
y + $$4\frac{1}{2}$$ show her future age i.e., the age after four and half years.
y – $$2\frac{1}{2}$$ shows her past age i.e., the age before two and half years.
(c) Number of students who like football = n
$$\therefore$$ 2n = twice the number of football players may like to play cricket.
and $$\frac{n}{2}$$ = half of the number of football 2 players may like to play basket ball.