Question

the school cafeteria serves tacos every sixth day and cheeseburgers every eight day .if both tacos and cheese burgers were on today's menu how many days will it be before they are both on the menu again?

Answer 1

Tacos-- 6th day
Cheeseburgers --- 8th day

Use LCM (lowest common multiple).

Multiples of 6: 6, 12, 18, 24, 30
Multiples of 8: 8, 16, 24

LCM: 24

It will be 24 days before they are both on the menu.