Fill in the brackets with the appropriate prime number 20 = () + ()

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• 1. What are the prime numbers within 20 What is prime
• 2. What are the prime numbers of 20?
• 3. The difference between prime number and prime number
• 4. What are prime numbers and prime numbers? What is their relationship?
• 5. Prime = prime?
• 6. Is the 71st power of 2 + 1 prime It is helpful for the responder to give an accurate answer
• 7. a. B and C are three prime numbers within 100, which satisfy a + B = C______ Group
• 8. Given 100 ^ a = 3100 ^ B = 5, find the value of (1) 100 ^ 2A + 100 ^ 3b and (2) 100 ^ 2A + 3B
• 9. There are three prime numbers a, B and C. the reciprocal sum of these three prime numbers is 31 / 1001. What are the three reciprocal numbers?
• 10. If the reciprocal sum of three different prime numbers is n of 1001, then n=
• 11. 10 = () × (), fill in the appropriate prime number
• 12. 10 = () + () = () + () fill in the appropriate prime number
• 13. Fill in the appropriate prime number in (). 10 = () + () = () + () 20 = () + () = () + ()
• 14. The prime number between 10 ` 20 has () where () digit is still a prime number after swapping position with digit on ten digit
• 15. The sum of two prime numbers is 20 and the product is 51. What's the difference between them
• 16. a. B is two different prime numbers. If a + B = 20, a * b = 51, then what are a and B respectively a. B is two different prime numbers. If a + B = 20, a * b = 51, then what are a and B respectively, the formula, method and idea should all be adopted,
• 17. a. B is two different prime numbers. If a + B = 20 and a * b = 51, what are the values of a and B?
• 18. Given that the quadrilateral ABCD is a convex quadrilateral, ab = 2, BC = 4, CD = 7, then the value range of segment ad is A: 0 < AC < 7 B: 2 < ad < 7 C: 0 < ad < 13 D: 1 < ad < 13 need to explain the reason
• 19. Given that a, B, C are prime numbers and a + B + C = 86, ab = BC = AC = 971, find a, B, C I found that I had the wrong number. It should be ab + BC + AC = 971... I was wrong =. =
• 20. Let a, B, C be prime numbers, and a + B + C = 68, AB + BC + AC = 1121, find the value of ABC It's urgent. Please hurry up