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?
three
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- 1. What is the difference between the product of all prime numbers within 10 minus the smallest three digits?
- 2. If a, B, C are all prime numbers, where a is the smallest, and a + B + C = 44, AB + 3 = C, then AB + C=______ .
- 3. Given that three different prime numbers a, B and C satisfy ABC + a = 2000, then a + B + C=______ .
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- 13. The sum of the two primes is 16. The two primes are______ And______ .
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- 20. Given that the real number ABC is not equal, a + 1 / b = B + 1 / C = C + 1 / D = D + 1 / a = x, find the value of X