Can you find the chosen number from the grid using the clues?
Use the information to describe these marbles. What colours must be on marbles that sparkle when rolling but are dark inside?
Four of these clues are needed to find the chosen number on this grid and four are true but do nothing to help in finding the number. Can you sort out the clues and find the number?
Use your logical reasoning to work out how many cows and how many sheep there are in each field.
Are all the possible combinations of two shapes included in this set of 27 cards? How do you know?
Use your logical-thinking skills to deduce how much Dan's crisps and ice-cream cost altogether.
Using the statements, can you work out how many of each type of rabbit there are in these pens?
The flow chart requires two numbers, M and N. Select several values for M and try to establish what the flow chart does.
Four friends must cross a bridge. How can they all cross it in just 17 minutes?
A man has 5 coins in his pocket. Given the clues, can you work out what the coins are?
Can you set the logic gates so that the number of bulbs which are on is the same as the number of switches which are on?
Investigate how logic gates work in circuits.
Using balancing scales what is the least number of weights needed to weigh all integer masses from 1 to 1000? Placing some of the weights in the same pan as the object how many are needed?
It's like 'Peaches Today, Peaches Tomorrow' but interestingly generalized.
What day of the week were you born on? Do you know? Here's a way to find out.
However did we manage before calculators? Is there an efficient way to do a square root if you have to do the work yourself?
Can you think like a computer and work out what this flow diagram does?
Can you set the logic gates so that this machine can decide how many bulbs have been switched on?
What will happen when you switch on these circular circuits?