# Just Jottings (14-16)

This collection of tasks is part of the activities for 14-16 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 11-14 year olds, and Just Jottings for 16-18 year olds.

### Slick Summing

##### Age 14 to 16Challenge Level

Watch the video to see how Charlie works out the sum. Can you adapt his method?

### Ben's Game

##### Age 11 to 16Challenge Level

Ben, Jack and Emma passed counters to each other and ended with the same number of counters. How many did they start with?

### Two and Two

##### Age 11 to 16Challenge Level

How many solutions can you find to this sum? Each of the different letters stands for a different number.

### Wipeout

##### Age 11 to 16Challenge Level

Can you do a little mathematical detective work to figure out which number has been wiped out?

### Curvy Areas

##### Age 14 to 16Challenge Level

Have a go at creating these images based on circles. What do you notice about the areas of the different sections?

### Negatively Triangular

##### Age 14 to 16Challenge Level

How many intersections do you expect from four straight lines ? Which three lines enclose a triangle with negative co-ordinates for every point ?