Question

Which of the following helps you to determine that two hundred seventy-nine is divisible by 9?

seventy-nine is divisible by 9.

2 plus 7 plus 9 is divisible by 9.

The last digit is a 9.

9 is divisible by 9.

Answer 1

2 plus 7 plus 9 is divisible by 9.

Answer 2

79 is not divisible by 9 so first option is eliminated

Answer 3

A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 150 mL of 60% sugar solution?
a. 70 mL of the 50% solution and 35mL of the 80% solution.
n. 35mL of the 50% solution and 70mL of the 80% solution.
c. 70mL of the 50% solution and 70mL of the 80% solution.
d. 35mL of the 50% solution and 35mL of the 80% solution.