Question
The total of the current ages of Aarav, Bishnu, Chinky,
and Danny is 94 years. Chinky's present age is 60% of Danny's present age and 50% more than Aarav's present age. Six years from now, Bishnu's age will be 25% more than his current age. Determine the average present age of Chinky and Danny.Solution
ATQ, Let the present age of 'Aarav' = '2p' years Then, present age of 'Chinky' = 2p × 1.5 = '3p' years Present age of 'Danny' = 3p ÷ 0.6 = '5p' years Let the present age of 'Bishnu' = 'q' years According to the question, (q + 6) = q × 1.25 Or, 0.25q = 6 So, q = 6 ÷ 0.25 = 24 And so, sum of present ages of 'Aarav', 'Chinky' and 'Danny' = 2p + 3p + 5p = '10p' years So, 10p = 94 - 24 = 70 So, p = (70/10) = 7 So, average of present age of 'Chinky' and 'Danny' = (3p + 5p) ÷ 2 = 4p = 28years
Evaluate: 360 ÷ [ {18 − (6×2)} × 5 ] + 72 − 33
(43)² - (28)² + (32)² = ?% of 2500
Evaluate:
√729 + √49 - √16 + 1/√64
What will come in place of (?) in the given expression.
12.5 + 7.75 - 3.6 = ?62 of 8 - 320 ÷ 4 = ?3 + 200
2(1/3) + 2(5/6) – 1(1/2) = ? – 6(1/6)
What will come in the place of question mark (?) in the given expression?
30% of 520 + 16% of 1500 = ? + 244
60% of 120 – ?% of 64 = 20% of 200
35% of 840 + 162 = ? – 25% × 300
20% of 240 + 18% of 200 = ?
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