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Let's Investigate Triangles
Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?
Age 5 to 7
Challenge Level
Tom's Dad sowed some tomato seed in February. He gave Tom one of the tomato plants in a pot.
At the beginning of May, Tom put his tomato plant outside. On the same day he sowed a bean in another pot.
Ten days later the bean plant was just $1$ cm (centimetre) above the soil surface. Tom measured his tomato plant which was already $38$ cm tall.
Each evening Tom measured his two plants.
On the evening of the next day the little bean plant had grown another $2$ cm so it was $3$ cm high. Each day it continued to grow double the amount it had grown the day before.
The tomato plant grew at a steady $5$ cm a day.
After how many days were the two plants the same height when Tom measured them in the evening? How high were they?
NRICH is part of the family of activities in the Millennium Mathematics Project.