Question

Aldo must choose a number between 55 and 101 that is a multiple of 3, 6, and 7.

Answer 1

A number that is a multiple of 3, 6, and 7 is 84. 
If you divide it by 7, you get 12. 
If you divide it by 6, you get 14. 
If you divide it by 3, you get 28. 
Hope this helps!