Other tags that relate to Roman Numerals
Making and proving conjectures. Comparing and ordering numbers. Factors and multiples. Counting. Multiplication & division. Place value. Reading, writing and representing numbers. Addition & subtraction. Video. Odd and even numbers.There are 13 results
Broad Topics > The Number System and Place Value > Number bases
Fingers and Hands
Age 7 to 11 Challenge Level:
How would you count the number of fingers in these pictures?
Alien Counting
Age 7 to 11 Challenge Level:
Investigate the different ways these aliens count in this challenge. You could start by thinking about how each of them would write our number 7.
Base Puzzle
Age 11 to 14 Challenge Level:
This investigation is about happy numbers in the World of the Octopus where all numbers are written in base 8 .Octi the octopus counts.
Basically
Age 11 to 14 Challenge Level:
The number 3723(in base 10) is written as 123 in another base. What is that base?
Back to the Planet of Vuvv
Age 11 to 14 Challenge Level:
There are two forms of counting on Vuvv - Zios count in base 3 and Zepts count in base 7. One day four of these creatures, two Zios and two Zepts, sat on the summit of a hill to count the legs of. . . .
Sometimes We Lose Things
Age 7 to 11 Challenge Level:
Well now, what would happen if we lost all the nines in our number system? Have a go at writing the numbers out in this way and have a look at the multiplications table.
A Story about Absolutely Nothing
Age 7 to 18
This article for the young and old talks about the origins of our number system and the important role zero has to play in it.
Balance Power
Age 11 to 18 Challenge Level:
Using balancing scales what is the least number of weights needed to weigh all integer masses from 1 to 1000? Placing some of the weights in the same pan as the object how many are needed?
Happy Octopus
Age 11 to 14 Challenge Level:
This investigation is about happy numbers in the World of the Octopus where all numbers are written in base 8 ... Find all the fixed points and cycles for the happy number sequences in base 8.
Learn about Number Bases
Age 11 to 18
We are used to writing numbers in base ten, using 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. Eg. 75 means 7 tens and five units. This article explains how numbers can be written in any number base.
It Must Be 2000
Age 7 to 11 Challenge Level:
Here are many ideas for you to investigate - all linked with the number 2000.
Oh for the Mathematics of Yesteryear
Age 11 to 14 Challenge Level:
A garrison of 600 men has just enough bread ... but, with the news that the enemy was planning an attack... How many ounces of bread a day must each man in the garrison be allowed, to hold out 45. . . .
NRICH is part of the family of activities in the Millennium Mathematics Project.