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Is there a temperature at which Celsius and Fahrenheit readings are the same?

Mixing Lemonade

Can you work out which drink has the stronger flavour?

Does This Sound about Right?

Examine these estimates. Do they sound about right?

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Age 11 to 14
Challenge Level
How could you estimate each of the quantities?
What extra information might you need to find out?

For some questions, you may need to be more accurate in your estimations than others to arrange the list in order of magnitude.