problem
Favourite
Consecutive Numbers
Age
7 to 14
Challenge level
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
problem
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Can you Make 100?
Age
11 to 14
Challenge level
How many ways can you find to put in operation signs (+, −, ×, ÷) to make 100?
problem
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Where can we visit?
Age
11 to 14
Challenge level
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?
problem
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Two and Two
Age
7 to 16
Challenge level
How many solutions can you find to this sum? Each of the different letters stands for a different number.
problem
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Number Daisy
Age
11 to 14
Challenge level
Can you find six numbers to go in the Daisy from which you can make all the numbers from 1 to a number bigger than 25?
problem
Favourite
The Root of the Problem
Age
14 to 18
Challenge level
Find the sum of this series of surds.
problem
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Remainders
Age
7 to 14
Challenge level
I'm thinking of a number. My number is both a multiple of 5 and a multiple of 6. What could my number be?
problem
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Largest product
Age
11 to 14
Challenge level
Which set of numbers that add to 100 have the largest product?
problem
Favourite
Cinema Problem
Age
11 to 14
Challenge level
A cinema has 100 seats. How can ticket sales make £100 for these different combinations of ticket prices?
problem
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Consecutive Seven
Age
11 to 14
Challenge level
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?
problem
Favourite
Method in multiplying madness?
Age
7 to 14
Challenge level
Watch our videos of multiplication methods that you may not have met before. Can you make sense of them?
game
Favourite
The Remainders Game
Play this game and see if you can figure out the computer's chosen number.
problem
Favourite
Going round in circles
Age
11 to 14
Challenge level
Mathematicians are always looking for efficient methods for solving problems. How efficient can you be?
problem
Favourite
Missing Multipliers
Age
7 to 14
Challenge level
What is the smallest number of answers you need to reveal in order to work out the missing headers?
problem
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Impossibilities
Age
11 to 14
Challenge level
Just because a problem is impossible doesn't mean it's difficult...
problem
Favourite
Overlaps
Age
11 to 14
Challenge level
Can you find ways to put numbers in the overlaps so the rings have equal totals?