Question

The LCM of two numbers is 280 and their ratio is 7: 8. The two numbers are

• A. 70,80
• B. 42,48
• C. 35,40
• D. 28,32

Answer 1

Answer: (C)

35,40

Answer 2

Let the two numbers be $7x$ and $8x$
Now, L.C.M.($7x,8x$)=$7\times8\times x$
$\rightarrow56x = 280$
$\rightarrow x=\frac{280}{56}=5$
Therefore, The two numbers are : 35, 40
The correct answer is (C) : 35,40