There are ten ducks. Five of these ducks each lay an egg every day. The other five duckseachlay an egg every second day. How many eggs in total do the ten ducks lay in a period of 10 days?

Nine flowers are planted in a row, same distance apart between any two adjacent flowers. The distance between the first and the third flower is 60 cm. What is the distance between the first and the last flower?

The number 100 is multiplied either by 2 or by 3, then the result is increased either by 1 or by 2, and then the new result is divided either by 3 or by 4.If the final result is a natural number, what is this final result?

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