Page 48 - NUMINO Challenge_D2
P. 48
Problem solving Key Points
1 A family of mom, dad, daughter, and son were Daughter and dad
traveling by car when the car stopped because it cannot ride the
ran out of gas. They found a bicycle in the trunk, bicycle together
and decided to go to the gas station by riding because the sum of
the bicycle. The bicycle can carry up to two their weights
people, and the maximum weight of two people exceeds 90 kg.
cannot exceed 90 kg. The weights of dad, mom,
son, and daughter are 68 kg, 47 kg, 42 kg and
39 kg respectively. At least how many times do
they need to travel? (Females cannot ride the
bicycle together.)
2 An explorer wants to cross a desert that is Use the method of
7 km long. He can walk 1 km per day, and he leaving bottles of
must drink one bottle of water a day. A maximum water in the desert
of 5 bottles of water can be taken from the and picking them up
village. At least how many days does the later.
explorer need to cross the desert?
45Reasoning
1 A family of mom, dad, daughter, and son were Daughter and dad
traveling by car when the car stopped because it cannot ride the
ran out of gas. They found a bicycle in the trunk, bicycle together
and decided to go to the gas station by riding because the sum of
the bicycle. The bicycle can carry up to two their weights
people, and the maximum weight of two people exceeds 90 kg.
cannot exceed 90 kg. The weights of dad, mom,
son, and daughter are 68 kg, 47 kg, 42 kg and
39 kg respectively. At least how many times do
they need to travel? (Females cannot ride the
bicycle together.)
2 An explorer wants to cross a desert that is Use the method of
7 km long. He can walk 1 km per day, and he leaving bottles of
must drink one bottle of water a day. A maximum water in the desert
of 5 bottles of water can be taken from the and picking them up
village. At least how many days does the later.
explorer need to cross the desert?
45Reasoning
