Other tags that relate to Mrs Trimmer's String
Odd and even numbers. Factors and multiples. Practical Activity. 2D shapes and their properties. Working systematically. Regular polygons and circles. Trial and improvement. Interactivities. Multiplication & division. Investigations.There are 321 results
Broad Topics > Thinking Mathematically > Working systematically
Count the Trapeziums
Age 7 to 11
Challenge Level
How many trapeziums, of various sizes, are hidden in this picture?
Seven Flipped
Age 7 to 11
Challenge Level
Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
Growing Garlic
Age 5 to 7
Challenge Level
Ben and his mum are planting garlic. Can you find out how many cloves of garlic they might have had?
Lots of Lollies
Age 5 to 7
Challenge Level
Frances and Rishi were given a bag of lollies. They shared them out evenly and had one left over. How many lollies could there have been in the bag?
Leap Frog
Age 5 to 7
Challenge Level
The brown frog and green frog want to swap places without getting wet. They can hop onto a lily pad next to them, or hop over each other. How could they do it?
Unit Differences
Age 5 to 7
Challenge Level
This challenge is about finding the difference between numbers which have the same tens digit.
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?
Nineteen Hexagons
Age 5 to 7
Challenge Level
In this maze of hexagons, you start in the centre at 0. The next hexagon must be a multiple of 2 and the next a multiple of 5. What are the possible paths you could take?
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?
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?
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?
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.
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.
What Shape and Colour?
Age 5 to 7
Challenge Level
Can you fill in the empty boxes in the grid with the right shape and colour?
A Mixed-up Clock
Age 7 to 11
Challenge Level
There is a clock-face where the numbers have become all mixed up. Can you find out where all the numbers have got to from these ten statements?
Whose Sandwich?
Age 5 to 7
Challenge Level
Chandra, Jane, Terry and Harry ordered their lunches from the sandwich shop. Use the information below to find out who ordered each sandwich.
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?
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?
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?
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?
One of Thirty-six
Age 5 to 7
Challenge Level
Can you find the chosen number from the grid using the clues?
Being Resourceful - Lower Primary Number
Age 5 to 7
Number problems for lower primary that will get you thinking.
Name the Children
Age 5 to 7
Challenge Level
Can you find out in which order the children are standing in this line?
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?
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?
Finding All Possibilities Lower Primary
Age 5 to 7
Challenge Level
These activities focus on finding all possible solutions so if you work in a systematic way, you won't leave any out.
Ordered Ways of Working Lower Primary
Age 5 to 7
Challenge Level
These activities lend themselves to systematic working in the sense that it helps if you have an ordered approach.
Homes
Age 5 to 7
Challenge Level
Six new homes are being built! They can be detached, semi-detached or terraced houses. How many different combinations of these can you find?
Finding All Possibilities Lower Primary
Age 5 to 7
Challenge Level
These activities focus on finding all possible solutions so working in a systematic way will ensure none are left out.
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.
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?
Shaping Up
Age 7 to 11
Challenge Level
Are all the possible combinations of two shapes included in this set of 27 cards? How do you know?
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?
Ordered Ways of Working Lower Primary
Age 5 to 7
Challenge Level
These activities lend themselves to systematic working in the sense that it helps to have an ordered approach.
Code Breaker
Age 7 to 11
Challenge Level
This problem is based on a code using two different prime numbers less than 10. You'll need to multiply them together and shift the alphabet forwards by the result. Can you decipher the code?
Plate Spotting
Age 7 to 11
Challenge Level
I was in my car when I noticed a line of four cars on the lane next to me with number plates starting and ending with J, K, L and M. What order were they in?
Counters
Age 7 to 11
Challenge Level
Hover your mouse over the counters to see which ones will be removed. Click to remove them. The winner is the last one to remove a counter. How you can make sure you win?
Family Tree
Age 7 to 11
Challenge Level
Use the clues to find out who's who in the family, to fill in the family tree and to find out which of the family members are mathematicians and which are not.
Adding Plus
Age 7 to 11
Challenge Level
Can you put plus signs in so this is true? 1 2 3 4 5 6 7 8 9 = 99 How many ways can you do it?
How Much Did it Cost?
Age 7 to 11
Challenge Level
Use your logical-thinking skills to deduce how much Dan's crisps and ice-cream cost altogether.
Symmetry Challenge
Age 7 to 11
Challenge Level
Systematically explore the range of symmetric designs that can be created by shading parts of the motif below. Use normal square lattice paper to record your results.
Ancient Runes
Age 7 to 11
Challenge Level
The Vikings communicated in writing by making simple scratches on wood or stones called runes. Can you work out how their code works using the table of the alphabet?
The Dice Train
Age 7 to 11
Challenge Level
This dice train has been made using specific rules. How many different trains can you make?
Sums and Differences 2
Age 7 to 11
Challenge Level
Find the sum and difference between a pair of two-digit numbers. Now find the sum and difference between the sum and difference! What happens?
Money Bags
Age 5 to 11
Challenge Level
Ram divided 15 pennies among four small bags. He could then pay any sum of money from 1p to 15p without opening any bag. How many pennies did Ram put in each bag?
Two by One
Age 7 to 11
Challenge Level
An activity making various patterns with 2 x 1 rectangular tiles.
Arranging the Tables
Age 7 to 11
Challenge Level
There are 44 people coming to a dinner party. There are 15 square tables that seat 4 people. Find a way to seat the 44 people using all 15 tables, with no empty places.
Multiples Grid
Age 7 to 11
Challenge Level
What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?
Whose Face?
Age 5 to 11
Challenge Level
These are the faces of Will, Lil, Bill, Phil and Jill. Use the clues to work out which name goes with each face.
NRICH is part of the family of activities in the Millennium Mathematics Project.