Two numbers are in the ratio 7 : 11. If their HCF is 28, then the sum of the two numbers is:
Answer & explanation
Correct answer: option 1
Let the numbers be 7x and 11x.
Add the numbers:
⇒ 7x + 11x
⇒ 18x
Now see, the final number must be the factor of 18, so in options only 504 is multiple of 18.