Page 135 - NUMINO Challenge_C2
P. 135
Type 15-2 Cooking Pancakes
It takes 1 minute to cook each side of a pancake. If two pancakes can
be cooked at the same time, find the quickest possible time to cook
three pancakes.
1 If you cook the front and back of two pancakes and then cook both sides
of the remaining pancake, how long does it take?
2 Why is the method used in 1 not very ef fective?
3 Let the three pancakes be , , and . The Frying Pan
chart shows the quickest way to cook all three 1 Minute Front Back
pancakes. Fill in the blanks.
1 Minute Front
1 Minute
4 What is the shortest possible time required to cook three pancakes?
5 It takes 4 minutes to bake each side of a loaf of bread. If two loaves can
be baked at the same time, write the quickest possible way to bake three
loaves, and find how long it will take.
132 NUMINO Challenge C2
It takes 1 minute to cook each side of a pancake. If two pancakes can
be cooked at the same time, find the quickest possible time to cook
three pancakes.
1 If you cook the front and back of two pancakes and then cook both sides
of the remaining pancake, how long does it take?
2 Why is the method used in 1 not very ef fective?
3 Let the three pancakes be , , and . The Frying Pan
chart shows the quickest way to cook all three 1 Minute Front Back
pancakes. Fill in the blanks.
1 Minute Front
1 Minute
4 What is the shortest possible time required to cook three pancakes?
5 It takes 4 minutes to bake each side of a loaf of bread. If two loaves can
be baked at the same time, write the quickest possible way to bake three
loaves, and find how long it will take.
132 NUMINO Challenge C2
