MathTrivia Questions & Answers
8 math trivia questions, each with the correct answer and a short explanation.
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Each question reveals the answer and a quick explanation below it.
1. A bat and ball cost $1.10. The bat costs $1 more than the ball. How much is the ball?
Answer: $0.05. If the ball is $0.05, the bat is $1.05, totaling $1.10.
2. A clock shows 3:00. What is the angle between the hands?
Answer: 90 degrees. At 3:00 the hands are 3 hours apart; each hour is 30 degrees, so 90 degrees.
3. A box has 4 red and 6 blue balls. Chance of drawing a red ball?
Answer: 2/5. 4 red out of 10 total equals 4/10, which simplifies to 2/5.
4. What is 15% of 200?
Answer: 30. 15% of 200 is 0.15 x 200, which equals 30.
5. If you flip a fair coin twice, chance of two heads?
Answer: 1/4. Each flip has 1/2 chance, so two heads is 1/2 x 1/2 = 1/4.
6. Two trains 100 km apart approach at 50 km/h each. A bird flies between at 80 km/h. Bird's distance?
Answer: 80 km. Trains meet in 1 hour (closing speed 100 km/h), so the 80 km/h bird flies 80 km.
7. Five people shake hands once with each other. How many handshakes total?
Answer: 10. Handshakes equal 5 x 4 / 2, which is 10.
8. Series: 2, 5, 11, 23, 47, ?
Answer: 95. Each term = previous×2 + 1: 2×2+1=5, 5×2+1=11, 11×2+1=23, 23×2+1=47, 47×2+1=95.
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