Question
Three years ago, 'B' was twice as old as 'A'. In three
more years, 'B' will be 60% older than 'A'. What is 'A's current age?Solution
Let the age of 'A', three years ago from now be '2x' years. So, age of 'B', 3 years ago from now = 2x X 2 = '4x' years ATQ; (2x + 6) X 1.6 = 4x + 6 Or, 3.2x + 9.6 = 4x + 6 Or, 3.6 = 0.8x So, x = 4.5 So, present age of 'A' = 2 X 4.5 + 3 = 12 years
- 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.)
?% of 549.83 – 18.05 × 31.96 = 44.94% of 479.84 – 13.98 × 33.13
What approximate value will come in place of question (?) in the following given expression? You are not expected to calculate the exact value.
...5555.05 + 500.05 + 5000.005 + 5.005 =?
25.19% of (?2 ÷ 38.87 × 4679.94) = 6299.82 ÷ 419.78 × 50.15
245.67 + 20.05² + ?³ = √961.89 * 34.02
2 (1/4)% of 7999.58 + {49.06% of 898.87} + √143.14 – 19.99% of 1499.63 - (52 - 41) = ?
√(195.99 X 8.99 X 15.87) X ³√124.99 = ? X 11.99
Find the approximate value of Question mark(?). No need to find the exact value.
(519.79 ÷ 10.03) × (47.98 ÷ 6) + √(63.94) × 4.04 = ?
...(1800.23 ÷ 29.98) + (816.32 ÷ 23.9) + 1634.11 = ?
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