Weekly Maths Puzzle - Puzzle 1

Weekly Math Puzzle - all students are free to participate; a weekly prize is up for grabs. Place answers in the box outside the Main Office before the end of the day every Friday. Don't forget to include name and calss...

This week's puzzle - Using the digits 1,7,7,7,7, create the number 100. You can use adding, subtracting, dividing, multiplication or brackets.