Other tags that relate to Inky Cube
Addition & subtraction. Interactivities. Games. Multiplication & division. Trial and improvement. Working systematically. Factors and multiples. Selecting and using information. Route inspection problems. Visualising.There are 84 results
Broad Topics > Thinking Mathematically > Trial and improvement
Inky Cube
Age 7 to 14
Challenge Level
This cube has ink on each face which leaves marks on paper as it is rolled. Can you work out what is on each face and the route it has taken?
Sliding Game
Age 7 to 11
Challenge Level
A shunting puzzle for 1 person. Swop the positions of the counters at the top and bottom of the board.
Number Sandwiches
Age 7 to 14
Challenge Level
Can you arrange the digits 1, 1, 2, 2, 3 and 3 to make a Number Sandwich?
Strike it Out
Age 5 to 11
Challenge Level
Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.
Cinema Problem
Age 11 to 14
Challenge Level
A cinema has 100 seats. Show how it is possible to sell exactly 100 tickets and take exactly £100 if the prices are £10 for adults, 50p for pensioners and 10p for children.
Strike it Out for Two
Age 5 to 11
Challenge Level
Strike it Out game for an adult and child. Can you stop your partner from being able to go?
Junior Frogs
Age 5 to 11
Challenge Level
Have a go at this well-known challenge. Can you swap the frogs and toads in as few slides and jumps as possible?
Fifteen Cards
Age 7 to 11
Challenge Level
Can you use the information to find out which cards I have used?
Got a Strategy for Last Biscuit?
Age 11 to 16
Challenge Level
Can you beat the computer in the challenging strategy game?
Pair Sums
Age 11 to 14
Challenge Level
Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?
Highest and Lowest
Age 7 to 11
Challenge Level
Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.
Four-digit Targets
Age 7 to 11
Challenge Level
You have two sets of the digits 0 – 9. Can you arrange these in the five boxes to make four-digit numbers as close to the target numbers as possible?
Pizza Cut
Age 7 to 11
Challenge Level
Using only six straight cuts, find a way to make as many pieces of pizza as possible. (The pieces can be different sizes and shapes).
Magic Potting Sheds
Age 11 to 14
Challenge Level
Mr McGregor has a magic potting shed. Overnight, the number of plants in it doubles. He'd like to put the same number of plants in each of three gardens, planting one garden each day. Can he do it?
Cycling Squares
Age 7 to 11
Challenge Level
Can you make a cycle of pairs that add to make a square number using all the numbers in the box below, once and once only?
3388
Age 11 to 14
Challenge Level
Using some or all of the operations of addition, subtraction, multiplication and division and using the digits 3, 3, 8 and 8 each once and only once make an expression equal to 24.
Domino Square
Age 7 to 11
Challenge Level
Use the 'double-3 down' dominoes to make a square so that each side has eight dots.
Charitable Pennies
Age 7 to 14
Challenge Level
Investigate the different ways that fifteen schools could have given money in a charity fundraiser.
Number Juggle
Age 7 to 11
Challenge Level
Fill in the missing numbers so that adding each pair of corner numbers gives you the number between them (in the box).
Fence It
Age 11 to 14
Challenge Level
If you have only 40 metres of fencing available, what is the maximum area of land you can fence off?
Sticky Dice
Age 7 to 11
Challenge Level
Throughout these challenges, the touching faces of any adjacent dice must have the same number. Can you find a way of making the total on the top come to each number from 11 to 18 inclusive?
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.
Factor-multiple Chains
Age 7 to 11
Challenge Level
Can you see how these factor-multiple chains work? Find the chain which contains the smallest possible numbers. How about the largest possible numbers?
Fitted
Age 7 to 11
Challenge Level
Nine squares with side lengths 1, 4, 7, 8, 9, 10, 14, 15, and 18 cm can be fitted together to form a rectangle. What are the dimensions of the rectangle?
Treasure Hunt
Age 7 to 14
Challenge Level
Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?
In the Money
Age 7 to 11
Challenge Level
One quarter of these coins are heads but when I turn over two coins, one third are heads. How many coins are there?
Coded Hundred Square
Age 7 to 11
Challenge Level
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?
Paw Prints
Age 7 to 11
Challenge Level
A dog is looking for a good place to bury his bone. Can you work out where he started and ended in each case? What possible routes could he have taken?
Going to the Cinema
Age 11 to 16
A cinema has 100 seats. Is it possible to fill every seat and take exactly £100?
Rabbits in the Pen
Age 7 to 11
Challenge Level
Using the statements, can you work out how many of each type of rabbit there are in these pens?
Escape from the Castle
Age 7 to 11
Challenge Level
Skippy and Anna are locked in a room in a large castle. The key to that room, and all the other rooms, is a number. The numbers are locked away in a problem. Can you help them to get out?
Difference
Age 7 to 11
Challenge Level
Place the numbers 1 to 10 in the circles so that each number is the difference between the two numbers just below it.
Prison Cells
Age 7 to 11
Challenge Level
There are 78 prisoners in a square cell block of twelve cells. The clever prison warder arranged them so there were 25 along each wall of the prison block. How did he do it?
What Two ...?
Age 7 to 11 Short
Challenge Level
56 406 is the product of two consecutive numbers. What are these two numbers?
Make 100
Age 7 to 11
Challenge Level
Find at least one way to put in some operation signs (+ - x ÷) to make these digits come to 100.
A Shapely Network
Age 7 to 11
Challenge Level
Your challenge is to find the longest way through the network following this rule. You can start and finish anywhere, and with any shape, as long as you follow the correct order.
Tom's Number
Age 7 to 11
Challenge Level
Work out Tom's number from the answers he gives his friend. He will only answer 'yes' or 'no'.
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.
One Million to Seven
Age 7 to 11
Challenge Level
Start by putting one million (1 000 000) into the display of your calculator. Can you reduce this to 7 using just the 7 key and add, subtract, multiply, divide and equals as many times as you like?
Arrange the Digits
Age 11 to 14
Challenge Level
Can you arrange the digits 1,2,3,4,5,6,7,8,9 into three 3-digit numbers such that their total is close to 1500?
Dice Stairs
Age 7 to 11
Challenge Level
Can you make dice stairs using the rules stated? How do you know you have all the possible stairs?
A Numbered Route
Age 7 to 11
Challenge Level
Can you draw a continuous line through 16 numbers on this grid so that the total of the numbers you pass through is as high as possible?
Path to the Stars
Age 7 to 11
Challenge Level
Is it possible to draw a 5-pointed star without taking your pencil off the paper? Is it possible to draw a 6-pointed star in the same way without taking your pen off?
Fractions in a Box
Age 7 to 11
Challenge Level
The discs for this game are kept in a flat square box with a square hole for each. Use the information to find out how many discs of each colour there are in the box.
Sums of Pairs
Age 11 to 16
Challenge Level
Jo has three numbers which she adds together in pairs. When she does this she has three different totals: 11, 17 and 22 What are the three numbers Jo had to start with?”
Area and Perimeter
Age 7 to 11
Challenge Level
What can you say about these shapes? This problem challenges you to create shapes with different areas and perimeters.
One to Eight
Age 11 to 14
Challenge Level
Complete the following expressions so that each one gives a four digit number as the product of two two digit numbers and uses the digits 1 to 8 once and only once.
Top-heavy Pyramids
Age 11 to 14
Challenge Level
Use the numbers in the box below to make the base of a top-heavy pyramid whose top number is 200.
Numbered Cars
Age 7 to 11
Challenge Level
I was looking at the number plate of a car parked outside. Using my special code S208VBJ adds to 65. Can you crack my code and use it to find out what both of these number plates add up to?
1, 2, 3, 4, 5
Age 7 to 11
Challenge Level
Using the numbers 1, 2, 3, 4 and 5 once and only once, and the operations x and ÷ once and only once, what is the smallest whole number you can make?
NRICH is part of the family of activities in the Millennium Mathematics Project.