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There are **2** NRICH Mathematical resources connected to **First order differential equations**, you may find related items under Calculus.

Problem
Primary curriculum
Secondary curriculum
### It's Only a Minus Sign

Solve these differential equations to see how a minus sign can change the answer

Age 16 to 18

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Out in Space

A space craft is ten thousand kilometres from the centre of the Earth moving away at 10 km per second. At what distance will it have half that speed?

Age 16 to 18

Challenge Level