Other tags that relate to Noah
Visualising. Counting. Combinations. Working systematically. Investigations. Comparing and ordering numbers. Games. Addition & subtraction. Practical Activity. Multiplication & division.There are 106 results
Broad Topics > Decision Mathematics and Combinatorics > Combinations
Button-up Some More
Age 7 to 11
Challenge Level
How many ways can you find to do up all four buttons on my coat? How about if I had five buttons? Six ...?
Penta Place
Age 7 to 11
Challenge Level
Penta people, the Pentominoes, always build their houses from five square rooms. I wonder how many different Penta homes you can create?
Bean Bags for Bernard's Bag
Age 7 to 11
Challenge Level
How could you put eight beanbags in the hoops so that there are four in the blue hoop, five in the red and six in the yellow? Can you find all the ways of doing this?
Chocs, Mints, Jellies
Age 7 to 11
Challenge Level
In a bowl there are 4 Chocolates, 3 Jellies and 5 Mints. Find a way to share the sweets between the three children so they each get the kind they like. Is there more than one way to do it?
Chocoholics
Age 7 to 11
Challenge Level
George and Jim want to buy a chocolate bar. George needs 2p more and Jim need 50p more to buy it. How much is the chocolate bar?
Cereal Packets
Age 7 to 11
Challenge Level
How can you put five cereal packets together to make different shapes if you must put them face-to-face?
Two Dice
Age 5 to 7
Challenge Level
Find all the numbers that can be made by adding the dots on two dice.
Elf Suits
Age 7 to 11
Challenge Level
If these elves wear a different outfit every day for as many days as possible, how many days can their fun last?
Two on Five
Age 5 to 11
Challenge Level
Take 5 cubes of one colour and 2 of another colour. How many different ways can you join them if the 5 must touch the table and the 2 must not touch the table?
Room Doubling
Age 7 to 11
Challenge Level
Investigate the different ways you could split up these rooms so that you have double the number.
Wag Worms
Age 7 to 11
Challenge Level
When intergalactic Wag Worms are born they look just like a cube. Each year they grow another cube in any direction. Find all the shapes that five-year-old Wag Worms can be.
Multilink Cubes
Age 7 to 11
Challenge Level
If you had 36 cubes, what different cuboids could you make?
Ice Cream
Age 7 to 11
Challenge Level
You cannot choose a selection of ice cream flavours that includes totally what someone has already chosen. Have a go and find all the different ways in which seven children can have ice cream.
Map Folding
Age 7 to 11
Challenge Level
Take a rectangle of paper and fold it in half, and half again, to make four smaller rectangles. How many different ways can you fold it up?
Train Carriages
Age 5 to 11
Challenge Level
Suppose there is a train with 24 carriages which are going to be put together to make up some new trains. Can you find all the ways that this can be done?
Sweets in a Box
Age 7 to 11
Challenge Level
How many different shaped boxes can you design for 36 sweets in one layer? Can you arrange the sweets so that no sweets of the same colour are next to each other in any direction?
Mrs Beeswax
Age 5 to 7
Challenge Level
In how many ways could Mrs Beeswax put ten coins into her three puddings so that each pudding ended up with at least two coins?
Making Cuboids
Age 7 to 11
Challenge Level
Let's say you can only use two different lengths - 2 units and 4 units. Using just these 2 lengths as the edges how many different cuboids can you make?
Halloween Investigation
Age 7 to 11
Challenge Level
Ana and Ross looked in a trunk in the attic. They found old cloaks and gowns, hats and masks. How many possible costumes could they make?
Mixed-up Socks
Age 5 to 7
Challenge Level
Start with three pairs of socks. Now mix them up so that no mismatched pair is the same as another mismatched pair. Is there more than one way to do it?
Calcunos
Age 7 to 11
Challenge Level
If we had 16 light bars which digital numbers could we make? How will you know you've found them all?
Jumping Cricket
Age 5 to 7
Challenge Level
El Crico the cricket has to cross a square patio to get home. He can jump the length of one tile, two tiles and three tiles. Can you find a path that would get El Crico home in three jumps?
Calendar Cubes
Age 7 to 11
Challenge Level
Make a pair of cubes that can be moved to show all the days of the month from the 1st to the 31st.
Buying a Balloon
Age 7 to 11
Challenge Level
Lolla bought a balloon at the circus. She gave the clown six coins to pay for it. What could Lolla have paid for the balloon?
Polo Square
Age 7 to 11
Challenge Level
Arrange eight of the numbers between 1 and 9 in the Polo Square below so that each side adds to the same total.
Team Scream
Age 7 to 11
Challenge Level
Seven friends went to a fun fair with lots of scary rides. They decided to pair up for rides until each friend had ridden once with each of the others. What was the total number rides?
Move a Match
Age 7 to 11
Challenge Level
How can you arrange these 10 matches in four piles so that when you move one match from three of the piles into the fourth, you end up with the same arrangement?
Briefcase Lock
Age 5 to 7
Challenge Level
My briefcase has a three-number combination lock, but I have forgotten the combination. I remember that there's a 3, a 5 and an 8. How many possible combinations are there to try?
Home City
Age 7 to 11
Challenge Level
Use the clues to work out which cities Mohamed, Sheng, Tanya and Bharat live in.
The School Trip
Age 5 to 7
Challenge Level
Lorenzie was packing his bag for a school trip. He packed four shirts and three pairs of pants. "I will be able to have a different outfit each day", he said. How many days will Lorenzie be away?
Red Express Train
Age 5 to 7
Challenge Level
The Red Express Train usually has five red carriages. How many ways can you find to add two blue carriages?
Street Party
Age 7 to 11
Challenge Level
The challenge here is to find as many routes as you can for a fence to go so that this town is divided up into two halves, each with 8 blocks.
Butterfly Cards
Age 7 to 11
Challenge Level
Four children were sharing a set of twenty-four butterfly cards. Are there any cards they all want? Are there any that none of them want?
Ladybirds in the Garden
Age 5 to 7
Challenge Level
In Sam and Jill's garden there are two sorts of ladybirds with 7 spots or 4 spots. What numbers of total spots can you make?
3 Blocks Towers
Age 5 to 7
Challenge Level
Take three differently coloured blocks - maybe red, yellow and blue. Make a tower using one of each colour. How many different towers can you make?
It Figures
Age 7 to 11
Challenge Level
Suppose we allow ourselves to use three numbers less than 10 and multiply them together. How many different products can you find? How do you know you've got them all?
New House
Age 7 to 11
Challenge Level
In this investigation, you must try to make houses using cubes. If the base must not spill over 4 squares and you have 7 cubes which stand for 7 rooms, what different designs can you come up with?
More and More Buckets
Age 7 to 11
Challenge Level
In this challenge, buckets come in five different sizes. If you choose some buckets, can you investigate the different ways in which they can be filled?
Button-up
Age 5 to 7
Challenge Level
My coat has three buttons. How many ways can you find to do up all the buttons?
3 Rings
Age 7 to 11
Challenge Level
If you have three circular objects, you could arrange them so that they are separate, touching, overlapping or inside each other. Can you investigate all the different possibilities?
Newspapers
Age 7 to 11
Challenge Level
When newspaper pages get separated at home we have to try to sort them out and get things in the correct order. How many ways can we arrange these pages so that the numbering may be different?
Let's Investigate Triangles
Age 5 to 7
Challenge Level
Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?
Three by Three
Age 5 to 11
Challenge Level
Arrange 3 red, 3 blue and 3 yellow counters into a three-by-three square grid, so that there is only one of each colour in every row and every column
Delia's Routes
Age 7 to 11
Challenge Level
A little mouse called Delia lives in a hole in the bottom of a tree.....How many days will it be before Delia has to take the same route again?
Those Tea Cups
Age 7 to 11
Challenge Level
Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the same colour.
More Children and Plants
Age 7 to 14
Challenge Level
This challenge extends the Plants investigation so now four or more children are involved.
Six Is the Sum
Age 7 to 11
Challenge Level
What do the digits in the number fifteen add up to? How many other numbers have digits with the same total but no zeros?
Triangle Animals
Age 5 to 7
Challenge Level
How many different ways can you find to join three equilateral triangles together? Can you convince us that you have found them all?
NRICH is part of the family of activities in the Millennium Mathematics Project.