1. Little Johnny buys 10 trees at a local nursery. How does he plant these 10 trees in 5 rows with 4 in each row?
2. How much dirt would be in a hole 6 feet deep and 6 feet wide that has been dug with a square edged shovel?
3. A railway line has a double track, except in a tunnel where there was no room for a double track. A train goes into the tunnel in one direction, and another one enters in the opposite direction. Both trains are traveling fast. However, they do not crash. Why?
Solution
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