This challenge is about finding the difference between numbers which have the same tens digit.
Use five steps to count forwards or backwards in 1s or 10s to get to 50. What strategies did you use?
This activity focuses on doubling multiples of five.
Throw the dice and decide whether to double or halve the number. Will you be the first to reach the target?
Here is a selection of different shapes. Can you work out which ones are triangles, and why?
Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.
Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?
This problem challenges you to find out how many odd numbers there are between pairs of numbers. Can you find a pair of numbers that has four odds between them?
Pat counts her sweets in different groups and both times she has some left over. How many sweets could she have had?
