# Resources tagged with: Number bases

### There are 16 results

Broad Topics >

The Number System and Place Value > Number bases

##### 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.

##### Age 14 to 16

Challenge Level

Explore the factors of the numbers which are written as 10101 in
different number bases. Prove that the numbers 10201, 11011 and
10101 are composite in any base.

##### Age 11 to 14

Challenge Level

The number 3723(in base 10) is written as 123 in another base. What
is that base?

##### Age 14 to 16

Challenge Level

Find b where 3723(base 10) = 123(base b).

##### Age 14 to 16

Challenge Level

A composite number is one that is neither prime nor 1. Show that
10201 is composite in any base.

##### 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. . . .

##### Age 14 to 16

Challenge Level

Start with any number of counters in any number of piles. 2 players take it in turns to remove any number of counters from a single pile. The loser is the player who takes the last counter.

##### 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.

##### Age 14 to 16

Challenge Level

You have worked out a secret code with a friend. Every letter in the alphabet can be represented by a binary value.

##### Age 7 to 16

Challenge Level

A collection of games on the NIM theme

##### 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.

##### 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.

##### 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?

##### Age 14 to 16

Challenge Level

How can Agent X transmit data on a faulty line and be sure that her message will get through?

##### 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. . . .

##### Age 14 to 16

Challenge Level

Ask a friend to choose a number between 1 and 63. By identifying which of the six cards contains the number they are thinking of it is easy to tell them what the number is.