Two numbers are in the ratio of 7:9 and their LCM is 630. Find the numbers
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e 70, 90.
Let the numbers be 7x and 9x.
Their LCM is 630.
The LCM of 7x and 9x is 63x (since LCM of 7 and 9 is 63).
So, 63x = 630
x = 630 ÷ 63 = 10
The numbers are = 7x = 7 × 10 = 70
9x = 9 × 10 = 90