Problem 1. The Rule of Three.

Arthur eats 98 candies every 2 days. How many candies will Arthur eat in 13 days?

Fill in here

Remember !

The simple rule of three is solved by identifying the relation of direct proportionality, then the unknown is calculated out of proportion.

Exemple !

Arthur eats 10 candies every 2 days. How many candies will Arthur eat in 5 days?

We note with y the unknown value.

2/5
=
10/y

y = 5 x 10 : 2

y = 25

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