Question

A storage gives every 42nd customer a $42 gift certificate.Every 30th customer gets a $30 gift certificate. What number customer will be the first to receive both types of gift certificate ?

Answer 1

the 210th customer

Explanation:

You have to find the LCM(Least Common Multiple of 42 and 30)

You can do that by prime factorizing 42 and 30 or listing out all multiples until you find a common multiple. Your common multiple will be 210.

Hope this helps.

Answer 2

72

Explanation:

let me know if this helps!