Zeller's Birthday
What day of the week were you born on? Do you know? Here's a way to find out.
What day of the week were you born on? Do you know? Here's a way to find out.
There are three baskets, a brown one, a red one and a pink one, holding a total of 10 eggs. How many eggs are in each basket?
This box does something to the numbers that go into it. If you know the numbers that come out, what might be going on inside the box?
Have a look at this table of how children travel to school. How does it compare with children in your class?
You have two sets of the digits 0-9. Can you arrange these in the five boxes to make four-digit numbers as close to the target numbers as possible?
Take a look at these data collected by children in 1986 as part of the Domesday Project. What do they tell you? What do you think about the way they are presented?
Can you see how these factor-multiple chains work? Find the chain which contains the smallest possible numbers. How about the largest possible numbers?
How much do you have to turn these dials by in order to unlock the safes?
Using the digits 1 to 9, the number 4396 can be written as the product of two numbers. Can you find the factors?
Charlie and Abi put a counter on 42. They wondered if they could visit all the other numbers on their 1-100 board, moving the counter using just these two operations: ×2 and -5. What do you think?