A tree grew by doubling its height every year and reached its full height in ten years. In how many years did it grow to half of its maximum height?
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Answer: 9 years
The tree doubled in height each year, meaning that in the year before it reached its full height, it must have been half its maximum height. Since the tree reached its full height in ten years, it would have been half that size at the end of the ninth year.
You’ll find me in Mercury, Earth, Mars, Jupiter, Saturn and Uranus. But never Neptune, or Venus. What am I?
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Answer: R
The letter “R” appears in the names Mercury, Earth, Mars, Jupiter, Saturn, and Uranus but is missing in Neptune and Venus.
On a bus, there is a 26-year-old expectant woman, a 30-year-old police officer, a 52-year-old stranger, and a 65-year-old driver. Who is the youngest?
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Answer: The baby of the pregnant lady.
While the ages of the passengers on the bus are mentioned, the pregnant woman is carrying a baby who has not yet been born. Since a baby in the womb is younger than everyone else, the correct answer is the unborn child.
In a single-story house where everything is yellow—the walls, doors, and furniture—what color are the stairs?
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Answer: Null/No color
There are no stairs because the house only has one story. Since it’s a single-story house, there is no need for stairs to go up or down to another level.
A man dies of old age on his 25 birthday. How is this possible?
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Answer: He was born on February 29th, a leap day, which only occurs once every four years. So, even though he lived for many years, his actual birthday only came around 25 times.