3 5 7 （） 13 A.8 B.9 C.10 D.11 Which one?

Choose D
All are prime numbers
Absolutely correct, please rest assured to adopt

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1. What are the known numbers a + B + C = 9 / 10, B-A = 2 / 1, B-C = 18 / 7, a, B, C? emergency Look for ideas!
2. In the parallelogram ABCD, the values of angle A: angle B: angle c: angle D can be a1:2:3; 4, b1:2:2:1, c1:1:2:2, d2:1:2:1 In the parallelogram ABCD, the values of angle A: angle B: angle c: angle D can be a1:2:3; 4, b1:2:2:1, c1:1:2:2, d2:1:2:1
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4. If a, B, C, D are mutually unequal integers, and ABCD = 49, find the value of (a + B + C + D-1) ^ 2013
5. Let ABCD be all positive numbers, ABCD = 1, then the minimum value of a ^ 4 + B ^ 4 + C ^ 4 + D ^ 4 is? Where a, B, C and D are?
6. Given a = 3, B = - 5, C = 7, find the following values 2a-c; a-b-c
7. If | a + 5 | + | B-7 | + | a + B + C | = 0, find the value of (A-3) (2-B) (C-9)
8. Given that a and B are opposite to each other, and C and D are reciprocal to each other, find the value of 4 / 3 (a + B + 2) - 2CD
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11. Given that a + B + C = 10 / 9, B-A = 1 / 2, B-C = 7 / 18, what are the numbers of a, B, C and C Please
12. -4/9,10/9,4/3,7/9,1/9 A．7/3 B 10/9 C -5/18 D -2 -4/9,10/9,4/3,7/9,1/9 A．7/3 B 10/9 C -5/18 D -2
13. If a, C, D are integers and B is a positive integer, and a + B = C, B + C = D, C + D = a is satisfied, then the maximum value of a + B + C + D is () A. -1B. -5C. 0D. 1
14. a. B, C, D are positive integers, B / a = (4d-7) / C, (B + 1) / a = 7 (D-1) / C to find the value of C / A What about D / a
15. Given that a, B, C are all positive integers, and B / a = 4d-7 / C, B + 1 = 7 (D-1) / C, what is the value of C / a? What is the value of D / b? To analyze. Fast. Urgent
16. A. If there are three numbers B and C, 2 / 3 of a equals 4 / 7 of B, 2 / 3 of B equals 4 / 7 of C, and C is 1 / 3 larger than a, then B is A. If 23 of a is equal to 47 of B, 23 of B is equal to 47 of C, and C is 13 greater than a, then B is () There are 15 students, each student has a number, which is 1 to 15 in turn. No. 1 wrote a five digit number, No. 2 said: "this number can be divided by 2", No. 3 said: "this number can be divided by 3", No. 4 said: "this number can be divided by 4" Students on the 15th said: "this number can be divided by 15.". The students of No. 1 checked one by one. Only the two students with consecutive numbers said that they were wrong, while the others were right
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19. If 1A: 1b: 1C = 2:3:4, then a: B: C=______ ．
20. If we know (1 + A + 1 / B + 1 / C + 1 / D) + 1 / 36 + 1 / 45 = 1, and a, B, C and D are just four continuous natural numbers, we can find the sum of a, B, C and D Today is the day,