Is there a relationship between the coordinates of the endpoints of a line and the number of grid squares it crosses?
What happens when you add a three digit number to its reverse?
Think of a number and follow the machine's instructions... I know what your number is! Can you explain how I know?
Four bags contain a large number of 1s, 3s, 5s and 7s. Can you pick ten numbers from the bags so that their total is 37?
My two digit number is special because adding the sum of its digits to the product of its digits gives me my original number. What could my number be?
Ten cards are put into five envelopes so that there are two cards in each envelope. The sum of the numbers inside it is written on each envelope. What numbers could be inside the envelopes?
In each of these games, you will need a little bit of luck and your knowledge of place value to develop a winning strategy.
If you can copy a network without lifting your pen off the paper and without drawing any line twice, then it is traversable. Decide which of these diagrams are traversable.
Can you arrange these numbers into 7 subsets, each of three numbers, so that when the numbers in each are added together, they make seven consecutive numbers?
What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?
