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Seven years ago the ratio of ages of A and B = 4x : 5x Ratio of Present ages of A and B = 4x + 7 : 5x + 7 After 8 years the ratio of ages of A and B, ⇒ (4x + 7 + 8) : (5x + 7 + 8) = 9 : 10 ⇒ 40x + 150 = 45x + 135 ⇒ 5x = 15 ⇒ x = 3 Sum of present ages of A and B = (4 × 3 + 7) + (5 × 3 + 7) = 41 years ∴ The sum of present ages of A and B is 41 years.
12 × 6 + 24 – 36 of 5 + 160 = ?
√1444 + √729 – √2116 = ?
I. 8x² - 74x + 165 = 0
II. 15y² - 38y + 24 = 0
180 ÷ 3 of 2 = 102 – ?
2850 ÷ 2.5 - ? × 42 = 300
4261 + 8234 + 2913 + 8217 + 6283 + 4172 =?
72 + 122 - 25% of 600 = ?