Question
Arjun is three years senior to Binny, who is twice as
old as Chinu. If the average age of Arjun, Binny, and Chinu is 21 years, what is the age difference between Binny and Chinu?Solution
Total age of Arjun, Binny and Chinu = 21 × 3 = 63 years Let the age of Chinu be‘c’ years Age of Binny = ‘2c’ years Age of Arjun = ‘2c + 3’ years According to the question, 2c + 3 + 2c + c = 63 5c + 3 = 63 5c = 60 c = 12 Age of Binny = 24 years Age of Chinu = 12 years Required difference = 24 – 12 = 12 years
 (108.999)² - (102.001)²=?
999.99 + 99.99 + 99 = ?
1199.98 ÷ 40.48 × 20.12 = ? × 3.16
?% of (144.31 ÷ 17.97 × 60.011) = 239.98
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.)...
From a point on the ground, the angle of elevation to the top of a tree is 30 degrees. If you walk 20 feet closer to the tree, the angle of elevation be...
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.)...
(16.16 ×  34.98) + 14.15% of 549.99 = ? + 124.34
√1024.21 × √624.89 ÷ 4.98 + 11.99 × 4.01 = ?
- 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.)
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