A number N divides 17 with the remainder of R and divides 30 with the remainder 2r. What is the largest value of N?

I really need it fast please.

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?

Ineed with number 6 , explain how to get 1978

Ingredient c: 1/4 cup for 2/3 serving or ingredient d: 1/3 cup for 3/4 serving which unit rate is smaller