Question
Eight years ago, the ratio of the ages of Ram and Shyam
was 5:6, respectively. Seven years hence, the ratio of the ages of Prem and Shyam will be 3:4, respectively. If Prem is 3 years younger than Ram, find the age of Ram, 'b' years hence from now, where 'b' is the second smallest two-digit prime number.Solution
ATQ Let the ages of Ram and Shyam 8 years ago be '5y' years and '6y' years, respectively. So, age of Prem 8 years ago = (5y - 3) years. ATQ, 
4 × (5y + 12) = 3 × (6y + 15) 20y + 48 = 18y + 45 20y - 18y = 45 - 48 y = 3 Since, 13 is the second smallest two-digit prime number. So, 'b' = 13 Therefore, age of Ram, 13 years hence = 5y + 8 + 13 = 5 × 3 + 21 = 36 years
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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