The concept of prime number a plus 40 is prime number a plus 80. What is prime number a equal to? ditto

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1. A is prime, a + 40 and a + 80 are prime. What is a?
2. A number 2a is prime, and a plus 20, a plus 40 are prime. What is a
3. How many factors does a prime number have
4. How many factors do prime numbers have
5. B is prime. How many factors does B have?
6. Prime numbers have only a few factors, which are () and ()
7. The sum of the factors of a prime number is 20. What is the prime number
8. Is 20 a composite number or a prime number? The factors of 20 are ()
9. Judgment: the factor of a prime number is still a prime number. () 2. 20 is a factor of 20 and a multiple of 10 ()
10. All the factors of 36 () where the prime number has () and the composite number has () 26＝（）＋（）＝（）＋（）＝（）＋（） 12 = () + () = () - () = () × () × () fill in the appropriate prime number
11. A is a one digit prime. A + 40 and a + 80 are prime. What is a
12. The sum of three primes is 80. What is the maximum product of the three primes?
13. The sum of three different prime numbers is 82, and the product of these three prime factors is ()
14. The sum of three different primes is 82. What is the maximum product of these three primes
15. The sum of three different primes is 82, and the product of these three primes is ()
16. The sum of three different primes is 82. What is the maximum product of these three primes? The reason! Emergency iiiiiiiiiiiiii11
17. The product of prime number and prime number is a number
18. What is the product of prime number and prime number
19. There are () factors of 120, and the sum of all its factors is ()
20. What are the factors of 120 urgent