Question

Q. The ratio between two numbers is 3:4 and their LCM is180. The first number is:

• A. 15
• B. 30
• C. 45
• D. 90
• E. None of these

Answer 1

The correct option is C 45

$180=3\times 4\times xx=\frac{180}{12}=15\text{Required number}=3\times 15=45$