Eight Queens
Place eight queens on an chessboard (an 8 by 8 grid) so that none can capture any of the others.
Place eight queens on an chessboard (an 8 by 8 grid) so that none can capture any of the others.
Can you put plus signs in so this is true? 1 2 3 4 5 6 7 8 9 = 99 How many ways can you do it?
Look carefully at the numbers. What do you notice? Can you make another square using the numbers 1 to 16, that displays the same properties?
George and Jim want to buy a chocolate bar. George needs 2p more and Jim need 50p more to buy it. How much is the chocolate bar?
Using the statements, can you work out how many of each type of rabbit there are in these pens?
Are all the possible combinations of two shapes included in this set of 27 cards? How do you know?
Find out about the lottery that is played in a far-away land. What is the chance of winning?
How many ways can you find to do up all four buttons on my coat? How about if I had five buttons? Six ...?
In this game for two players, take it in turns to shade one petal, or two petals next to each other. Is it better to go first or second?