Question
I. 5x2 – 18x + 16 = 0 II.
3y2 – 35y - 52 = 0 In the following questions, two equations numbered I and II are given. You have to solve both the equations and give answer.Solution
I. 5x2 – 18x + 16 = 0 => 5x2 – 10x – 8x + 16 = 0 => 5x(x – 2) – 8(x – 2) = 0 => (x – 2) (5x - 8) = 0 => x = 2, 8/5 II. 3y2 – 35y - 52 = 0 => 3y2 – 39y + 4y - 52 = 0 => 3y (y – 13) + 4(y – 13) = 0 => (y – 13) (3y + 4) = 0 => y = 13, -4/3 Hence, x = y or the relationship cannot be established.
1784.04 - 483.98 + 464.98 ÷ 15.06 = ?3
- 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.)
(168.24 ÷ 23.98) x 19.81 + ? = 176.33
64.889% of 399.879 + √? = 54.90% of 799.80 – 44.03% of 400.21
A bag contains 25 white and some black balls. If the probability of drawing a black ball from the bag is thrice that of drawing a white ball, fin...
49.96% of 120.21 + √(15) ÷ 1.87 × 4.41 = ?Â
619.97 ÷ 20.01 X 124.99 ÷ 24.91 = ?
180.25 × 14.995 ÷ √26 = ? × 5.985
A number is first increased by 35% and then decreased by 35%. If the net change in the number is 302.5, then find the original number.
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