Page 65 - NUMINO Challenge_A2
P. 65
Type Study Magic Flowers
Lisa brought home a magic flower in a fishbowl. The magic flower
increases by a factor of 2 everyday. After 10 days, the surface of the
water is completely covered by flowers. For the flowers to completely
cover the surface of the water in 9 days, how many flowers does Lisa
need to put into the fishbowl on the first day? All magic flowers
increase by the same factor.
1 The flowers completely covered the surface of the water in the fishbowl
after 10 days. Work backwards and think about the portion that is
covered with flowers in 9 days. Color the covered portion in the space
below.
10th Day 9th Day
2 Look at the colored portion of the surface of the water on the 9th day.
How many more flowers are needed to cover the surface completely?
3 For the surface to be completely covered by flowers on the 9th day,
how many flowers must Lisa put into the fishbowl on the first day?
62 NUMINO Challenge A2
Lisa brought home a magic flower in a fishbowl. The magic flower
increases by a factor of 2 everyday. After 10 days, the surface of the
water is completely covered by flowers. For the flowers to completely
cover the surface of the water in 9 days, how many flowers does Lisa
need to put into the fishbowl on the first day? All magic flowers
increase by the same factor.
1 The flowers completely covered the surface of the water in the fishbowl
after 10 days. Work backwards and think about the portion that is
covered with flowers in 9 days. Color the covered portion in the space
below.
10th Day 9th Day
2 Look at the colored portion of the surface of the water on the 9th day.
How many more flowers are needed to cover the surface completely?
3 For the surface to be completely covered by flowers on the 9th day,
how many flowers must Lisa put into the fishbowl on the first day?
62 NUMINO Challenge A2
