# NRICH PROBLEM SOLVING NUMBER BONDS

All Change Age 5 to 7 Challenge Level: Two Spinners Age 5 to 7 Challenge Level: You may wish to encourage leaners to visualise a larger triangle made out of these small triangles before showing them the interactive. Can you be the first to complete a row of three? Register for our mailing list.

Always, Sometimes or Never? Which ones do you have to leave out? Light the Lights Age 5 to 7 Challenge Level: Each grab some coins, return some, then share equally what they had put back, finishing with their own share. Investigate which numbers make these lights come on. Slide the shared counter across several adjacent numbers, adding them up as you go to make a ‘running’ total. Starting with , subratct a number from 1 to 9 from the total.

# Pairs of Numbers :

When number pyramids have a sequence on the bottom layer, some interesting patterns emerge Sweets are given out to party-goers in solvng particular way. This is the total both you and the adult are trying to make.

What strategies did you use? This problem looks at how one example of your choice can show something about the general structure of multiplication. Ip Dip Age problrm to 11 Challenge Level: What operation miight you use to make the result bigger? Try out this number trick.

Can you find some more abundant numbers? In the early stages the generalisation will be a statement in words, later this may be refomulated into symbolic representation.

In Sticky Triangles KS2 pupils are asked to make geometric patterns with sticks and predict how many they would need to continue the pattern. Can you predict what will happen?

How would you create the largest possible two-digit even number from the digit I’ve given you and one of your choice? Can you find 2 butterflies to go on each flower so that the numbers on each pair of butterflies adds to the solviny number as the one on the flower?

To support this aim, members 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.

The game uses a 3×3 square board. Imagine a pyramid which is built in square layers of small cubes. What was Annie’s secret number? What do you notice? What do you notice about these squares of numbers? How do you play? Age 7 to 11 Challenge Level: A game rpoblem 2 players.

# Maths Search :

This challenge is a game for two players. The Box Game Age 3 to 5 Sollving and subtracting. Two Spinners Age 5 to 7 Challenge Level: Making Algebra Rich Age 5 to 11 Lynne suggests activities which support the development of primary children’s algebraic thinking.

Roman Numerals Age 7 to 11 Challenge Level: Sklving Eleven Age 11 to 14 Challenge Level: Largest Even Age 5 to 7 Challenge Level: Problem You may also like Traffic Lights The game uses a 3×3 square board.

## Search by Topic

A game for 1 person to play on screen. Money Bags Age 5 to 11 Challenge Level: The adult places their counter on the game board over one of the numbers and says that number.

Making the total go above the target loses you the game. Try grouping the dominoes in the ways described.