The value of the circle changes in each of the following problems. Can you discover its value in each problem?
Sally and Ben were drawing shapes in chalk on the school playground. Can you work out what shapes each of them drew using the clues?
Katie had a pack of 20 cards numbered from 1 to 20. She arranged the cards into 6 unequal piles where each pile added to the same total. What was the total and how could this be done?
Find at least one way to put in some operation signs to make these digits come to 100.
What do you notice about these squares of numbers? What is the same? What is different?
Can you work out what a ziffle is on the planet Zargon?
Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.
Charlie and Abi put a counter on 42. They wondered if they could visit all the other numbers on their 1-100 board, moving the counter using just these two operations: x2 and -5. What do you think?
