Five Steps to 50
Age 5 to 7
Challenge Level
Use five steps to count forwards or backwards in 1s or 10s to get to 50. What strategies did you use?
Two-digit Targets
Age 5 to 7
Challenge Level
You have a set of the digits from 0 – 9. Can you arrange these in the five boxes to make two-digit numbers as close to the targets as possible?
One Big Triangle
Age 5 to 7
Challenge Level
Make one big triangle so the numbers that touch on the small triangles add to 10.
Find the Difference
Age 5 to 7
Challenge Level
Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.
Eggs in Baskets
Age 5 to 7
Challenge Level
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?
Four Colours
Age 5 to 11
Challenge Level
Kate has eight multilink cubes. She has two red ones, two yellow, two green and two blue. She wants to fit them together to make a cube so that each colour shows on each face just once.
Heads and Feet
Age 5 to 7
Challenge Level
On a farm there were some hens and sheep. Altogether there were 8 heads and 22 feet. How many hens were there?
Starfish Spotting
Age 5 to 7
Challenge Level
How many starfish could there be on the beach, and how many children, if I can see 28 arms?
The Brown Family
Age 5 to 7
Challenge Level
Use the information about Sally and her brother to find out how many children there are in the Brown family.
The Tall Tower
Age 5 to 7
Challenge Level
As you come down the ladders of the Tall Tower you collect useful spells. Which way should you go to collect the most spells?
4 Dom
Age 5 to 16
Challenge Level
Use these four dominoes to make a square that has the same number of dots on each side.
NRICH is part of the family of activities in the Millennium Mathematics Project.