d Question 11 & 12 | Job Exam Rare Mathematics (JEMrare) - Solved MCQs

# Question 11 & 12

Question 11: 5 years ago fathers age was three times of his son’s age. If son is now 30 years old what is his father’s age?

Federal Public Service Commission 2017 – 2nd batch

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Solution:

Let five years ago;

Fathers age = x years

Son’s age = y years

So, as per statement of question;

Father’s age = 3 x Son’s age

so after five years (present time)  this relation will turn like this;

But at present son’s age is 30 years , so;

Put in above;

So, Fathers current age is 80 years;

Question 12: After spending 280 rupees 30 % of the total is left. What was before the expenditure?

Federal Public Service Commission 2017 – 2nd batch

Solution:

Let the amount before spending = x RS

so when 280 Rs are spent, the remaining  amount will be ;

According to question this amount should be equale to 30% of initial amount i-e;

So the initial amount , i-e before spending — was Rs 400.