PPSC Excise and Taxation Inspector 2018 Question Paper

Practice Mode:
51.

The ratio between the present ages of Indu and Gurpreet is 3:8, respectively. After 8 years, Indu's age will be 20 years. What was Gurpreet's age 5 year ago ?

A: 37 years
B: 27 years
C: 28 years
D: 38 years

The answer is: B

<< Previous Question
Next Question >>

Explanation

Answer: B - 27 years

Step by step calculation:

Step 1 - Find Indu's present age:

After 8 years, Indu's age = 20 years

Indu's present age = 20 − 8 = 12 years

Step 2 - Find Gurpreet's present age:

Ratio of Indu : Gurpreet = 3 : 8

If Indu = 3x → 3x = 12 → x = 4

Gurpreet's present age = 8x = 8 × 4 = 32 years

Step 3 - Find Gurpreet's age 5 years ago:

Gurpreet's age 5 years ago = 32 − 5 = 27 years

  • Step 1 - Find present age from future/past clue
  • Step 2 - Use ratio to find other person's present age
  • Step 3 - Apply the final condition (5 years ago/later)