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Prime numbers within 20 Ah, different styles
The prime numbers within 20 are: 2, 3, 5, 7, 11, 13, 17, 19. There are seven in all
What are the prime numbers within 20?
Come on
2,3,5,7,11,13,17,19
Prime numbers within 20 are______ The total number within 20 is______ The odd numbers within 20 are______ Even numbers within 20 have______ ．
According to the definition of prime number, composite number, even number and odd number, prime numbers within 20 are: 2, 3, 5, 7, 11, 13, 17 and 19; composite numbers within 20 are: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18 and 20; odd numbers within 20 are: 1, 3, 5, 7, 9, 11, 13, 15, 17 and 19; even numbers within 20 are: 1, 3, 5, 7, 9, 11, 13, 15, 17 and 19
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- 1. The sum of all prime numbers within 20 is () A .76 B .77 C .78
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- 8. Given | 2a-1 | + | 3b-2 | = 0, find the value of a + B fast
- 9. Given 10 ^ a = 2, 10 ^ B = 3, find 100 ^ 2a-1 / 3B
- 10. There are three prime numbers whose product is 1001. What are the three prime numbers?
- 11. Fill in the brackets with the appropriate prime number 20 = () + () 19 = () + () 35 = () × () 17 = () + () × () Fill in the brackets with the appropriate prime number 20 = () + () 19 = () + () 35 = () × () 17 = () + () × () Two exactly the same right angle trapezoid, can be put together into a (), can also be put together into a () Natural numbers greater than 0 are both primes and even numbers (); () are neither primes nor composite numbers.
- 12. Given that the quadrilateral ABCD is a rectangle, ab = 2, ad = 3, e is the moving point on the line BC, f is the midpoint of CD, and ∠ AEF is an obtuse angle, then the range of de length of the line segment is
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- 14. Given that a, B and C are prime numbers, and a + B + C = 86, AB + BC + Ca = 971, find the value of ABC
- 15. AB is prime, and the molecule of a / 1 + B / 1 is 30. How many pairs of AB are there?
- 16. Given that AB is prime and 3a + 2B = 2000, find the value of a + B
- 17. What's the difference between the product of prime numbers within 10 plus the smallest two digits and subtracting the smallest two digits and subtracting the smallest three digits
- 18. The product of all prime numbers within 10 minus the largest two digits, the difference is______ ．
- 19. The least common multiple of the three prime numbers is 42, and the three prime numbers are (), () and (). There is a reward for it
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