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Mathematics fun competition
1. has a natural number, and its sum with 168 is exactly equal to the square of a certain number; Its sum with 100 is equal to the square of another number. Find this natural number.

2。 Allen, Bart, Clay, Dick and Earle have all played tennis twice, and there will be no draw in each game. The following is the competition information. : 1, each league only played four games, Allen played Bart, Allen played Earl, Clay played Dick and Clay played Earl 2. There is only one match between the two leagues. Allen was the champion of the first league. Every time he loses a game in the league, he is eliminated. Only the champion has not lost a game. Q: Who was the champion of the second league?

3。 Prove: 1, if the product of two numbers is greater than 75, there must be a factor greater than 8.

2, the product of a two-digit number multiplied by five is also a two-digit number, so the number in the tenth place of this two-digit number is 1.

Five people took part in the bicycle race and said such things after the race.

The first person said, A is second, B is third.

The second person said that C was the third and D was the fifth.

The third person said that D was the first and C was the second.

The fourth person said, A is second, and E is fourth.

The fifth person said that B was the first and E was the fourth.

Now we know that one of the two words you said is right and the other is a lie. Please find out the real competition ranking.

Give you a password and see if you can crack it.

E T W Q

+ F W F Q

—————

A W Q Q Q

* Note: All capital letters represent numbers, and the same letters represent the same numbers. Decode these three sets of numbers.

It will be too much trouble to write down all the steps to solve the problem. Excuse me!