Problem Solving

How many times does the digit 7 appear in the numbers between 750 and 780 (including 750 and 780)?

A school of 135 pupils together with 15 teachers and parents are going on a trip. They will travel by bus. Each bus has 44 seats and everyone must sit in a seat.

How many buses do they need for the trip?

On the trip the school goes to Wellington Zoo. Teachers and parents get in for free. The school is charging $2.75 for each student.

150 people go on the trip and 15 of them are adults.

What is the total cost for the children going to the Zoo?

Arrange the numbers 2, 4, 6, 8, 10, 12,14,16, 18 to make a magic square. In a magic square, each row, column or diagonal all sum to the same number.