Question

which is a multiple of 15 3,5,55,60​

Answer 1

Remember that multiples are numbers that can be divided by a number without a remainder so in this case you could add 15 by 15 to find what number in this set is a multiple of 15.

$15+15=30$

$30+15=45$

$45+15=60$

$=60$

Therefore your answer is "60."

Hope this helps.