Question

The ratio between two numbers is 7:8. If each number is increased by 9, the ratio between then become 10:11, find the difference between numbers.

A 3 Correct Answer Incorrect Answer
B 4 Correct Answer Incorrect Answer
C 6 Correct Answer Incorrect Answer
D 8 Correct Answer Incorrect Answer
E 9 Correct Answer Incorrect Answer

Solution

Let first number be 7x and the second number is 8x. According to the question, => (7x + 9)/(8x + 9) = 10/11 => 77x + 99 = 80x + 90 => x = 3 Required difference = 8x – 7x = x = 3

Practice Next
×
×