Interesting question 2: Two candles of the same length, the first one can light for 4 hours, and the second one can light for 3 hours. Two candles are lit at the same time. After a few hours, the length of the first candle is twice that of the second candle.
Interesting question 3: Add 168 to a certain number to get the square of a positive integer, and add 100 to get the square of a positive integer. What's this number?
Interesting question 4: Someone walked for five hours, first along the flat road, then up the mountain, and finally walked back to the original place along the original road. If he walked 4 kilometers per hour on the level road, 3 kilometers per hour up the mountain and 6 kilometers per hour down the mountain, how many kilometers did he walk in 5 hours?
Interesting question 5: Miss Zhao's age has the following characteristics: (1) Its cubic power is a four-digit number, while its quartic power is a six-digit number; (2) The digits of these four digits and six digits are exactly the tens of digits from 0 to 9. Q: How old is Miss Zhao this year?
Interesting topic 6: There are three horses on the racetrack, A, B and C. A can run twice a minute, B can run three times and C can run four times. Now three horses are side by side at the starting line, ready to start in the same direction. Excuse me: after a few minutes, can these three horses run side by side at the starting line again?
Interesting question 7: There are four numbers, and the sum of any three numbers is 84, 88, 99, 1 10 respectively. Try to find these four numbers.
Interesting question 8: In the same plane, 1 circle divides the plane into two parts, and two circles divide the plane into four parts at most, ... How many parts does 10 circle divide the plane into at most?
Interesting question 9: A person starts from point M, advances 20 meters, then turns right at 15 degrees, advances 20 meters, and then turns right at 15 degrees. ................................................................................................................, if so, how many meters did he walk when he returned to M?
Interesting question 10: Two different coins are tangent and the other circle rolls around the other circle. How many times did the circle * * * rotate when it returned to the starting point?
Interesting question 1 1: Can you cut a square into six squares?
Interesting topic 12: Two candles with the same length, the first one can be lit for 4 hours, and the second one can be lit for 3 hours. These two candles are lit at the same time. After a few hours, the length of the first candle is twice that of the second candle.
Interesting question 13: Adding 168 to a number can get the square of a positive integer, and adding 100 can also get the square of a positive integer. What's this number?
Interesting topic 14: someone walked for 5 hours, first along the flat road, then up the mountain, and finally walked back to the original place along the original road. If he walked 4 kilometers per hour on the level road, 3 kilometers per hour up the mountain and 6 kilometers per hour down the mountain, how many kilometers did he walk in 5 hours?
Interesting topic 15: Miss Zhao's age has the following characteristics: (1) Its cubic power is a four-digit number, while its fourth power is a six-digit number; (2) The digits of these four digits and six digits are exactly the ten digits of 0-9.
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