Question
If the product of two numbers is 60 and the sum of
their squares is 169, then what is the sum of these two numbers?Solution
Let the two numbers be x and y Then, ATQ: xy = 60    ----eq.(1) x2+ y2 = 169    ----eq.(2) Also, (x + y)2 = x2 + y2 + 2xy ⇒ (x + y)2 = 169 + (2 × 60); From eq.1 and eq.2 ⇒ (x + y)2 = 289 ⇒ x + y = 17 ∴ Sum of the two numbers = 17
(56.04% of 550.06 + 19.92 × 18.13) – 121.97 = ?
√1567.763`xx` √4400 ÷ 326.9827 + 1223.293 = ?
33.33% of 809.891 + 66.66% of 212.91 = ?
- 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.)
? + 163.99 – 103.01 = 24.01 × 6.98
320.98 + 49.99% of (261.09 + 138.98) = ?
(1331)1/3 x 10.11 x 7.97 ÷ 16.32 =? + 15.022
What approximate value should replace the question mark?
1 ÷ 8.12 of 255.60 + 66.67% of 150 = ?² - 123.75
19.86% of 145.12 1/2 × 65.12 = ? × 2.12
Ankush and Binny began a business where Ankush contributed 75% of the total capital. Four months later, Chintu joined the busines...
