Design an algorithm to determine whether 35 is a prime number

Prime numbers can only be divided by themselves, 35 can be divided by 5 or 7, obviously not

A small experiment is designed to prove the existence of air by using common articles at home

Take a syringe and pull it out to let the air into the syringe. Then block the hole of the syringe by hand and squeeze it inward. It is found that it can not be squeezed to the original state, which proves the existence of air

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1. A small experiment is designed to prove the existence of air by using common articles at home
2. A small experiment is designed to prove the existence of air by using common articles at home
3. How to judge whether a five digit input is palindrome number, such as "12321" Enter a five digit number on the keyboard to determine whether it is a five digit number, such as "12321", which is palindrome number!
4. A five digit palindrome number, divided by 45, gets a four digit palindrome number. The original five digit palindrome number is ()
5. It is known that a five bit palindrome is equal to 45, and that a five bit palindrome is equal to the product of 45 and a four bit palindrome It is known that a five bit palindrome is equal to the product of 45 and a four bit palindrome (abcda = 45xdeed)
6. If a natural number reverses each number, it is still itself. This number is palindrome number, such as 606, 90509. How many palindromic numbers are there from 1 to 1000000? How to find them?
7. Find some English palindrome words (left and right symmetry)
8. 1. Write a function, whose function is to determine whether a number is palindrome number. (the so-called palindrome number is read from left to right and read from right to left is the same number, such as 101). Find such a number between 11 and 999, it is not only palindrome number, but also its square sum cube is palindrome number
9. If the square of a number is equal to 1 / 64, then the number is zero（
10. Among the first 2009 numbers, there are () numbers that are neither square nor cubic
11. How many palindromes are there in five digits
12. How to prove whether any number can be divided by 3? Next I'll show you how to learn whether any number can be divided by 3 Example 1: can 456321 divide by 3? No, add up all its numbers and divide by 3. If the division is complete, then it can divide by 3. If the division is incomplete, then it can't divide by 3. 4 + 5 = 9, 9 + 6 = 15, 15 + 3 = 18, 18 + 2 = 20, 20 + 1 = 21. 21 can divide by 3, so 456321 can divide by 3 Example 2: can 86453 divide by 3? No, add up all its numbers and divide by 3. If it can divide completely, then it can divide by 3. If it can't divide completely, then it can't divide by 3. 8 + 6 = 14, 14 + 4 = 18, 18 + 5 = 23, 23 + 3 = 26.26, so 86453 can't divide by 3 I read the above paragraph on the Internet. I want to know how to prove this principle?
13. The maximum number of five palindromes divisible by 101 Palindromes are positive integers like 36563 2002
14. Who can prove that the sum of two primes is even?
15. Any even number greater than 2 can be expressed as the sum of two prime numbers. How to prove?
16. Polynomial. The difference between a polynomial and - 5Y & # 178; - 13y is - Y & # 178; + 3y-1 2. Given X-Y = 3, xy = 2, find the difference of (3y-2x + 2x + XY) - (- 5x + 6xy + 6y) 3. Given a = 2m & # 178; n-mn & # 178;, A-B = 0, find B
17. It is proved that no matter what number m is, the value of square-m of algebraic formula m is always greater than that of algebraic formula m-2
18. 1) It is proved that if a divides B × C, and a and B are coprime, then a divides C (ABC is an integer). If the theorem is wrong, give an example and modify it, and prove the modified theorem 2) It is proved that if a and B are positive integers, if a > b, then the square of a > the square of B, and vice versa
19. Let's introduce letters. The suitable algebra is: (1) an integer divisible by 3; (2) an integer whose remainder is 2
20. Can you show that (n + 7) & sup2; - (N-5) & sup2; is divisible by 24