Ratio & Proportion
JKSSB Junior Assistant · Numerical Ability · 98 practice questions with answers and explanations: 44 Easy, 32 Medium, 22 Hard.
Sample questions
Sample Easy question 1
Find the fourth proportional to 2, 3 and 8.
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- 12
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Answer: C. 2:3 = 8:x, so x = (3×8)/2 = 12.
Sample Medium question 2
The present ages of P and Q are in the ratio 5:7. Five years hence, the ratio will be 3:4. Find P's present age.
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- 25
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Answer: C. Solving (5x+5)/(7x+5)=3/4 gives x=5, so P's age = 5×5 = 25.
Sample Hard question 3
The present ages of two people are in the ratio 4:5, and their sum is 81 years. Find the older person's age.
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- 45
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Answer: D. Total parts = 9, each part = 9 years; older person = 5 × 9 = 45 years.