Mrs. Ramon and her 2 children want to cross the river in a boat that can safely hold 160 pounds of weight at any one time. Mrs. Ramon weighs 120 pounds and her children each weigh 80 pounds. Using only their superior math skills and without extra materials (rope, extra flotation devices, etc.), how can they all cross the river?
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1. Send the two children across first
2. Have one child return with the boat
3. Send Mrs. Ramon over alone
4. Send other kid back with boat
5. Send both kids over.
2. Have one child return with the boat
3. Send Mrs. Ramon over alone
4. Send other kid back with boat
5. Send both kids over.
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Solution
Imagine side A (origin) and side B (destination) of the river.
1- Child 1 and child 2 use the boat (side A) to across the river (side B).
2- One of the child (example child 1) use the boat to go side A.
3- Child 1 stay alone (side A) and Mrs Ramon use the boat to across the river toward side B.
4- Child 2 use the boat to across the river toward side A.
5- Finally both children (child 1 and child 2) use the boat to across the river to joint their mother (Mrs Ramon) side B.
Imagine side A (origin) and side B (destination) of the river.
1- Child 1 and child 2 use the boat (side A) to across the river (side B).
2- One of the child (example child 1) use the boat to go side A.
3- Child 1 stay alone (side A) and Mrs Ramon use the boat to across the river toward side B.
4- Child 2 use the boat to across the river toward side A.
5- Finally both children (child 1 and child 2) use the boat to across the river to joint their mother (Mrs Ramon) side B.
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I think mrs ramon goes first then the kids