Ratio & Proportion

JKSSB Sub-Inspector (Executive) · Mathematics · 98 practice questions with answers and explanations: 44 Easy, 32 Medium, 22 Hard.

Sample questions

Sample Easy question 1

Rs. 360 is divided among A, B and C in the ratio 2:3:4. What is C's share?

  1. 120
  2. 140
  3. 160
  4. 180
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Answer: C. Total parts = 9, each part = 40. C's share = 4 × 40 = 160.

Sample Medium question 2

Two vessels contain milk and water in the ratio 3:2 and 5:3 respectively. If 40 units from each are mixed, find the new milk to water ratio.

  1. 45:32
  2. 49:31
  3. 50:30
  4. 48:33
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Answer: B. Vessel 1 gives 24 milk/16 water, vessel 2 gives 25 milk/15 water; combined = 49 milk : 31 water.

Sample Hard question 3

Two numbers are in the ratio 3:4. If 10 is added to both numbers, the ratio becomes 4:5. Find the product of the numbers.

  1. 1000
  2. 1100
  3. 1200
  4. 1300
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Answer: C. Solving (3x+10)/(4x+10)=4/5 gives x=10, so numbers are 30 and 40, with a product of 1200.

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