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Number Balance

Age 5 to 7 Challenge Level:


This is a number balance.

number balance
 
It is also called a 'balance bar' or an 'equaliser'. It has weights:
 
weights
 
These are hung below the numbers. It balances equal numbers, for example like this:
 
balancing 10 on one side with 2 and 8 on the other
 
 
Where would you need to hang the weight to make the one below balance?
 
9=3+4+?
 
What about this one?
 
9+4=6+?
 
If you had to use two weights and make the one below balance, where could you put them?
 
9 and 6 on one side, 10 and 4 on the other
 
How many different ways can you make it balance with two weights?