Some of the numbers have fallen off Becky’s number line. Investigate what happens when you add house numbers along a street in different ways. You may also like Chocolate There are three tables in a room with blocks of chocolate on each. The numbers of the songs are displayed by combining special small single-digit cards. Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether! Can you sort out the clues and find the number? Look at some of the results from the Olympic Games in the past.

Number Differences Age 7 to 11 Challenge Level: How many different trains can you make? Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. These caterpillars have 16 parts. How did this work? This multiplication uses each of the digits 0 – 9 once and once only. A magician took a suit of thirteen cards and held them in his hand face down.

Whoever is the closer wins. Can you sort out which is which?

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Trebling Ptoblem 7 to 11 Challenge Level: How could you put these three beads into bags? You have a set of the digits from 0 — 9. Can you work out what is on each face and the route it has taken?

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 explain your findings?

What do you notice about the numbers that it produces? Investigate the total number of sweets received by people sitting in different positions. What happens when you round these three-digit numbers to the nearest ?

Design an arrangement of display boards in the school hall which fits the requirements of different people. Who said that adding couldn’t be fun? Farey Sequences Age 11 to 14 Challenge Level: Who said that adding couldn’t be fun? Register for our mailing list.

# Nice or Nasty :

To ppace this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich placce tasks into everyday classroom practice. Dicey Addition Age 5 to 11 Challenge Level: Who had made the highest even number? Consecutive Seven Age 11 to 14 Challenge Level: What rule might he have chosen? Think of a two digit number, reverse the digits, and add the numbers together.

## Place Value, Integers, Ordering & Rounding

Valie these two jigsaws then put one on top of the other. Can you order the digits from to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on? Becky created a number plumber which multiplies by 5 and subtracts 4. Who said that adding, subtracting, multiplying and dividing couldn’t be fun?

# Working Systematically at KS2 :

What do you notice? Age 7 to 11 Challenge Level: Can you build it up? How do you know where to place the numbers? Can you see how these factor-multiple chains work? To support this aim, members of the NRICH team work in a wide range of pfoblem, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

Which labels would you put on each row and column? Some of the numbers have fallen off Becky’s number line. To support this aim, sovling of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.