List

Being Resourceful - Number

Funny Factorisation
problem

Funny Factorisation

Age
11 to 16
Challenge level
filled star filled star empty star
Using the digits 1 to 9, the number 4396 can be written as the product of two numbers. Can you find the factors?
Where can we visit?
problem

Where can we visit?

Age
11 to 14
Challenge level
filled star filled star empty star
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: x2 and -5. What do you think?
Two and Two
problem

Two and Two

Age
7 to 16
Challenge level
filled star filled star filled star
How many solutions can you find to this sum? Each of the different letters stands for a different number.
Stars
problem

Stars

Age
11 to 14
Challenge level
filled star filled star empty star
Can you work out what step size to take to ensure you visit all the dots on the circle?
Product Sudoku
problem

Product Sudoku

Age
11 to 16
Challenge level
filled star filled star empty star
The clues for this Sudoku are the product of the numbers in adjacent squares.
A Chance to Win?
problem

A Chance to Win?

Age
11 to 14
Challenge level
filled star filled star filled star
Imagine you were given the chance to win some money... and imagine you had nothing to lose...
Nice or Nasty
problem

Nice or Nasty

Age
7 to 14
Challenge level
filled star empty star empty star
There are nasty versions of this dice game but we'll start with the nice ones...
How much can we spend?
problem

How much can we spend?

Age
11 to 14
Challenge level
filled star empty star empty star
A country has decided to have just two different coins, 3z and 5z coins. Which totals can be made? Is there a largest total that cannot be made? How do you know?
Cryptarithms
problem

Cryptarithms

Age
11 to 14
Challenge level
filled star empty star empty star
Can you crack these cryptarithms?
Forwards Add Backwards
problem

Forwards Add Backwards

Age
11 to 14
Challenge level
filled star empty star empty star
What happens when you add a three digit number to its reverse?
Gabriel's Problem
problem

Gabriel's Problem

Age
11 to 14
Challenge level
filled star empty star empty star
Gabriel multiplied together some numbers and then erased them. Can you figure out where each number was?
Xavi's T-shirt
problem

Xavi's T-shirt

Age
7 to 16
Challenge level
filled star empty star empty star
How much can you read into a T-shirt?
Number Lines in Disguise
problem

Number Lines in Disguise

Age
7 to 14
Challenge level
filled star filled star empty star
Some of the numbers have fallen off Becky's number line. Can you figure out what they were?
Dozens
problem

Dozens

Age
7 to 14
Challenge level
filled star empty star empty star
Can you select the missing digit(s) to find the largest multiple?
missing multipliers
problem

Missing Multipliers

Age
7 to 14
Challenge level
filled star empty star empty star
What is the smallest number of answers you need to reveal in order to work out the missing headers?