Page 133 - NUMINO Challenge_C2

Type 15-1 Multiplying Mushrooms

It takes 20 days for one magical mushroom that
doubles in number every day to completely fill a
cave. If you start with two magical mushrooms, how
long will it take to completely fill the cave?

1 Find the number of magical mushrooms af ter each day for five days.
When you start with one magical mushroom

Today Af ter 2 days Af ter 3 days Af ter 4 days Af ter 5 days
1

When you start with two magical mushrooms
Today Af ter 2 days Af ter 3 days Af ter 4 days Af ter 5 days

2

2 Compared to when starting with one magical mushroom, how much faster
will the cave be filled when starting with two magical mushrooms?

3 Af ter how many days will the entire cave be filled with magical
mushrooms, when starting with two magical mushrooms?

4 Af ter how many days will the cave be half filled, when starting with one
magical mushroom?

130 NUMINO Challenge C2