Problem
Materials:
- paper
- pencil
On Friday at 9 am, the magic plant was 2 centimetres tall.
Each day, the plant’s height doubled and it was two times as tall as the day before.
How tall was it on Monday at 9 am?
Possible Hints/Questions:
- Maybe you could draw a number line that goes up and down to help show how much the plant grew?
- What does “two times as tall” mean?
- How tall was the plant on Saturday at 9am?
- How tall was the plant on Sunday at 9am?
Possible Extension:
- How tall do you predict the plant will be on Thursday? Find out if you are right.
Adapted from nrich.maths.org
Categories: Elementary