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### Number and algebra

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### Probability and statistics

### Working mathematically

### Advanced mathematics

### For younger learners

# Primary Live Problems and Recent Solutions

### Primary Live Problems

### Sea Level

### Primary Students' Solutions

### Eightness of Eight

### If the World Were a Village

### Seeing Parallelograms

### Open Boxes

### Seeing Rhombuses

### Two Clocks

### Dice in a Corner

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Each time you visit the NRICH site there will be some activities which are 'live'. This means we are inviting students to send us solutions, and we will publish a selection of them, along with each student's name and their school, a few weeks later. If you'd like to know more about what we're looking for, read this short article.

*The last day for submitting solutions to these live problems is Monday 27 November.*

Age 7 to 11

Challenge Level

The picture shows a lighthouse and some underwater creatures. Can you work out the distances between some of the different creatures?

Take a look at these recently solved problems.

Age 5 to 7

Challenge Level

What do you see as you watch this video? Can you create a similar video for the number 12?

Age 5 to 11

Challenge Level

This activity is based on data in the book 'If the World Were a Village'. How will you represent your chosen data for maximum effect?

Age 7 to 11

Challenge Level

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.

Age 7 to 11

Challenge Level

Can you work out how many cubes were used to make this open box? What size of open box could you make if you had 112 cubes?

Age 7 to 11

Challenge Level

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a rhombus.

Age 7 to 11

Challenge Level

These clocks have only one hand, but can you work out what time they are showing from the information?

Age 7 to 11

Challenge Level

How could you arrange at least two dice in a stack so that the total of the visible spots is 18?