The number within 20 is both odd and composite number has () no decimal! The number within 20 is both even and prime number has? In natural numbers 1-20, odd numbers have () even numbers have () prime numbers have () combined numbers have ()

Odd numbers have (1 357 9 11 13 15 17), even numbers have (2 468 10 12 14 16 18 20), prime numbers have (2 357 11 13 17 19), combined numbers have (4 689 10 12 14 16 18 20)
Both odd and combined numbers have (9, 15)
Are even numbers and prime numbers (2)

RELATED INFORMATIONS

1. The sum of not even numbers within 10 is______ The prime number that is not odd is______ ．
2. A polynomial composed of two monomials is called a binomial. How many terms will be the result of multiplication of two binomials? Write several such products and write the result
3. If the product of a linear binomial and (x ^ 2-2x-1) does not contain a linear term, find the linear binomial, and let the linear binomial be x + a
4. It is known that the product of a linear binomial and x ^ 2-3x + 1 does not contain a quadratic term. Please write a linear binomial satisfying the condition
5. What is an item? What is the number of items? What is a similar item?
6. Can 1.8A and 1.2A be multiplied? Or, can similar terms be multiplied
7. Several formulas for multiplication of polynomials by polynomials (a+b)(c+d)= (a+b)(c-d)= (a-b)(c+d)= (a-b)(c-d)= How to write these formulas?
8. May I ask the general expression and number of terms of bivariate polynomials of higher degree The bivariate polynomial is Z = A0 + A1 * x + A2 * y, and there are three terms; The bivariate quadratic polynomial is Z = A0 + A1 * x + A2 * y + a3 * x * x + A4 * x * y + A5 * y * y, with 6 terms; So if it is a binary m-degree polynomial, how to express it? What is the total number of terms?
9. The complex z = 3 + AI and | Z-2 are known|
10. Given the complex z = 2m-1 + (M + 1) I (1) if the point corresponding to the complex Z is in the first quadrant, find the value range of the real number m; (2) if the complex | Z | ≤ 3, find the value range of the real number M
11. According to the number of divisors, natural numbers can be divided into: (1) prime numbers and composite numbers; (2) odd numbers and even numbers; (3) prime numbers, composite numbers and zero ④ Prime, composite and 1
12. According to the number of factors, natural numbers can be divided into () a odd number and even number, B prime number and composite number, C prime number, composite number, 0,1,
13. Natural numbers consist of. A. odd and even numbers B. Prime number and composite number
14. The product of the smallest natural number, the smallest prime number and the smallest composite number is ()
15. In the natural number, the product of the smallest prime number and the smallest composite number is (); and the number of even prime number is ()
16. The product of the sum of the smallest prime number and the smallest composite number multiplied by the smallest natural number is______ ．
17. What is the smallest number that is both prime and odd______ ．
18. Determine whether the 75th power + 1 of 8 is prime or composite
19. Is the 67th power of 2 minus 1 prime?
20. Is the 67th power of 2 minus 1 prime or sum?