There is half an apple pie left. You want to eat twice what your little brother eats but you also need to save a slice for your mum. You cut her a slice that is 30°.

Question

Word problem

Answer 1

Think of the pie as a circle. A whole pie represents an angle of 360°, so half a pie is 180° and 30° is mum's slice. That leaves 150° of pie for you and your little brother. We can divide that into three slices of 50° each, that's two for you (100° slice) and one for your brother (50° slice).