There are **70** NRICH Mathematical resources connected to **Comparing and Ordering numbers**, you may find related items under Numbers and the Number System.

Some of the numbers have fallen off Becky's number line. Can you figure out what they were?

Use the interactivities to fill in these Carroll diagrams. How do you know where to place the numbers?

How have the numbers been placed in this Carroll diagram? Which labels would you put on each row and column?

Use the numbers and symbols to make this number sentence correct. How many different ways can you find?

Try some throwing activities and see whether you can throw something as far as the Olympic hammer or discus throwers.

Look at the changes in results on some of the athletics track events at the Olympic Games in 1908 and 1948. Compare the results for 2012.

Look at some of the results from the Olympic Games in the past. How do you compare if you try some similar activities?

How would you create the largest possible two-digit even number from the digit I've given you and one of your choice?

Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?

Mr Gilderdale is playing a game with his class. What rule might he have chosen? How would you test your idea?

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

There are nasty versions of this dice game but we'll start with the nice ones...

These caterpillars have 16 parts. What different shapes do they make if each part lies in the small squares of a 4 by 4 square?

Can you see how these factor-multiple chains work? Find the chain which contains the smallest possible numbers. How about the largest possible numbers?

Can you complete this jigsaw of the multiplication square?

Use the number weights to find different ways of balancing the equaliser.

Can you hang weights in the right place to make the equaliser balance?

In this 100 square, look at the green square which contains the numbers 2, 3, 12 and 13. What is the sum of the numbers that are diagonally opposite each other? What do you notice?

These sixteen children are standing in four lines of four, one behind the other. They are each holding a card with a number on it. Can you work out the missing numbers?

Can you arrange these numbers into 7 subsets, each of three numbers, so that when the numbers in each are added together, they make seven consecutive numbers?

Use these head, body and leg pieces to make Robot Monsters which are different heights.

As you come down the ladders of the Tall Tower you collect useful spells. Which way should you go to collect the most spells?

There are lots of ideas to explore in these sequences of ordered fractions.

Would you rather: Have 10% of £5 or 75% of 80p? Be given 60% of 2 pizzas or 26% of 5 pizzas?

Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.

A political commentator summed up an election result. Given that there were just four candidates and that the figures quoted were exact find the number of votes polled for each candidate.

There are six numbers written in five different scripts. Can you sort out which is which?

Which is the bigger, 9^10 or 10^9 ? Which is the bigger, 99^100 or 100^99 ?

Jack's mum bought some candles to use on his birthday cakes and when his sister was born, she used them on her cakes too. Can you use the information to find out when Kate was born?

Can you work out the domino pieces which would go in the middle in each case to complete the pattern of these eight sets of 3 dominoes?

Buzzy Bee was building a honeycomb. She decorated the honeycomb with a pattern using numbers. Can you discover Buzzy's pattern and fill in the empty cells for her?

Watch the video of Fran re-ordering these number cards. What do you notice? Try it for yourself. What happens?

Take a look at the video of this trick. Can you perform it yourself? Why is this maths and not magic?

Can you find different ways of creating paths using these paving slabs?

Number problems at primary level that require careful consideration.

Number problems for inquiring primary learners.

Matching Numbers game for an adult and child. Can you remember where the cards are so you can choose two which match?

Dicey Operations for an adult and child. Can you get close to 1000 than your partner?

Some Games That May Be Nice or Nasty for an adult and child. Use your knowledge of place value to beat your opponent.

Some children have been doing different tasks. Can you see who was the winner?

Complete these two jigsaws then put one on top of the other. What happens when you add the 'touching' numbers? What happens when you change the position of the jigsaws?

Can you each work out the number on your card? What do you notice? How could you sort the cards?

These interactive dominoes can be dragged around the screen.

Investigate what happens when you add house numbers along a street in different ways.

Can you put the numbers from 1 to 15 on the circles so that no consecutive numbers lie anywhere along a continuous straight line?

How can you arrange these 10 matches in four piles so that when you move one match from three of the piles into the fourth, you end up with the same arrangement?

Use the fraction wall to compare the size of these fractions - you'll be amazed how it helps!