AB = C, if a and B are prime numbers, then C must be () emergency

AB = C, given that a and B are prime numbers, then C must be (composite)

RELATED INFORMATIONS

1. Given that three different prime numbers a, B and C satisfy ABC + a = 2000, then a + B + C=______ ．
2. If a, B and C are prime numbers, then is ab + BC + AB necessarily prime
3. 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
4. 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 =. =
5. 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
6. a. B is two different prime numbers. If a + B = 20 and a * b = 51, what are the values of a and B?
7. 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,
8. The sum of two prime numbers is 20 and the product is 51. What's the difference between them
9. The prime number between 10 ` 20 has () where () digit is still a prime number after swapping position with digit on ten digit
10. Fill in the appropriate prime number in (). 10 = () + () = () + () 20 = () + () = () + ()
11. A and B are prime numbers. The product of AB must be () A. Prime B. even C. composite D. undetermined
12. Given that three different prime numbers a, B and C satisfy ABC + a = 2000, then a + B + C=______ ．
13. If a, B, C are all prime numbers, where a is the smallest, and a + B + C = 44, AB + 3 = C, then AB + C=______ ．
14. What is the difference between the product of all prime numbers within 10 minus the smallest three digits?
15. A prime number, 10 plus it is a prime number, 20 plus it or a prime number, 70 minus it or a prime number, what is the prime number?
16. The least common multiple of the three primes is 42. The three primes are () The maximum odd number that can be divided by 3 and 7 at the same time within 100 is (), and the maximum even number is () The maximum divisor of a number is a, and its minimum multiple is () The greatest common divisor of all even numbers is (), and the greatest common divisor of all odd numbers is ()
17. The least common multiple of the three primes is 225. What are the three primes? The answer is 3.5.17. I don't know why?
18. The sum of the two primes is 16. The two primes are______ And______ ．
19. The sum of the four primes is 16. What is the product of the four primes
20. The sum of the two primes is 16, and the two primes are () The sum of the two prime numbers is 16, and the two prime numbers are () and (). [this has no product, only sum]