Question
What was the sum of the ages of the father and the
daughter 5 years earlier? A.  Ratio of the father’s present age to the daughter’s age after 5 years is 5 : 2. B. The difference between twice the present age of the father and five times the daughter‘s present age is 20 years. C. The ratio of the age of the father after 5 Years to tha age of the daughter after 6 years is 5: 2. The following questions are accompanied by three statement A, B and C. you have to determine which statement (s) is /are necessary/ sufficient to answer the question.Solution
Let the present ages of father and daughter be F and D years respectively. A. = 
 (5/2) 2F = 5D + 20 2F – 5 D = 20 B. 2 F – 5 D = 20 C. = ((F+5)/(D+6)) = (5/2) 2 F + 10 = 5 D + 30 2 F – 5 D = 20 Here, all the three equations are the same.
More Data Sufficiency Questions
15.99% of 549.99 ÷ 11.17 = ? ÷ 20.15
74.91% of 639.95 – 599.98% of 45 + 119.987 = ?
(4.88 × 5.76)2 - ?2 = 39.89 × 19.86
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.)
(1800.23 ÷ 29.98) + (816.32 ÷ 23.9) + 1634.11 = ?
1449.98 ÷ 50.48 × 10.12 = ? × 2.16
36.05 × 5.02 + 12.052 = ? + 9.09 × 4.04Â
(31.9)3 + (34.021)² - (16.11)3 - (42.98)² = ?
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