Or search by topic
Katie and Will have some balloons, some are red and some are blue.
First, Katie blew up a red one. After her first puff her balloon had a circumference of $24$ cm.
Her second puff added $\frac{1}{2}$ as much again to that.
Her third puff increased it by $\frac{1}{3}$.
Her fourth puff increased it by $\frac{1}{4}$ and her fifth puff by $\frac{1}{5}$.
Her sixth puff increased it by $\frac{1}{6}$ and at the beginning of her seventh puff it went
Next, Will blew up a blue balloon. After his first puff his balloon had a circumference of $14$ cm.
And, just like Katie's, his second puff added $\frac{1}{2}$ as much again to that and his third puff increased it by $\frac{1}{3}$.
His fourth puff increased it by $\frac{1}{4}$ and so on.
His balloon burst at exactly the same size as Katie's at the beginning of a puff.
How many puffs had Will done before his balloon burst?
There are three tables in a room with blocks of chocolate on each. Where would be the best place for each child in the class to sit if they came in one at a time?