Being resourceful

Mandeep's watch loses two minutes every hour. Adam's watch gains one minute every hour. Can you work out what time they arrived at the airport?

Find at least one way to put in some operation signs to make these digits come to 100.

On my calculator I divided one whole number by another whole number and got the answer 3.125. If the numbers are both under 50, what are they?

Amy has a box of domino pieces. Which of her domino pieces are missing?

Arrange cards numbered 1 to 20 into 6 piles. Can each pile add to the same total?

Can you fill in this table square? The numbers 2-12 were used to generate it with just one number used twice.

One quarter of these coins are heads but when I turn over two coins, one third are heads. How many coins are there?

The discs for this game are kept in a flat square box with a square hole for each. Use the information to find out how many discs of each colour there are in the box.

This multiplication uses each of the digits 0 - 9. Can you work out where each digit goes?

Can you use four digits to make four two-digit numbers that add to 100?