Just Jottings (11-14)

This collection of tasks is part of the activities for 11-14 year olds section of the Maths At Home feature. All you need to get started is a pencil and paper! The stars represent the challenge level, with three stars indicating the most challenging activities. 

You may also wish to explore Just Jottings for 7-11 year olds, and Just Jottings for 14-16 year olds.

Making a Difference

Age 11 to 14 Challenge Level:

How many different differences can you make?

Cryptarithms

Age 11 to 14 Challenge Level:

Can you crack these cryptarithms?

Substitution Cipher

Age 11 to 14 Challenge Level:

Find the frequency distribution for ordinary English, and use it to help you crack the code.

Always a Multiple?

Age 11 to 14 Challenge Level:

Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...

Peaches Today, Peaches Tomorrow...

Age 11 to 14 Challenge Level:

A monkey with peaches, keeps a fraction of them each day, gives the rest away, and then eats one. How long can his peaches last?

Cuboids

Age 11 to 14 Challenge Level:

Can you find a cuboid that has a surface area of exactly 100 square units. Is there more than one? Can you find them all?