Here's the question:
Flo eats spaghetti every other day. She eats apple pie every three days.
Today is Tuesday. Yesterday, which was Monday, she ate both spaghetti and
apple pie. How many times during the next 60 days does she eat both spaghetti and apple pie?
My son answered it by writing out a table with the days of the week and just marking down every other day graphically etc. It seemed a very long winded way, but I wasn't able to advise him on another method.
Any ideas?! As you can tell, 11+ maths is not my forte
Also, can anyone suggest other similar questions that we can practice, and let me know what is the topic is called? Many thanks!