Can you find the chosen number from the grid using the clues?
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?
How many legs do each of these creatures have? How many pairs is that?
Arrange the numbers 1 to 6 in each set of circles below. The sum of each side of the triangle should equal the number in its centre.
Pat counts her sweets in different groups and both times she has some left over. How many sweets could she have had?
If there are 3 squares in the ring, can you place three different numbers in them so that their differences are odd? Try with different numbers of squares around the ring. What do you notice?
This problem looks at how one example of your choice can show something about the general structure of multiplication.
Are these statements relating to odd and even numbers always true, sometimes true or never true?
Follow the clues to find the mystery number.
