Ratio and proportion

There are 112 NRICH Mathematical resources connected to Ratio and proportion
Number Lines in Disguise
problem

Number Lines in Disguise

Age
7 to 14
Challenge level
filled star filled star empty star
Some of the numbers have fallen off Becky's number line. Can you figure out what they were?
Another Triangle in a Triangle
problem

Another Triangle in a Triangle

Age
16 to 18
Challenge level
filled star filled star empty star
Can you work out the fraction of the original triangle that is covered by the green triangle?