The least common multiple of the three prime numbers is 42, and the three prime numbers are (), () and (). There is a reward for it

RELATED INFORMATIONS

• 1. The product of all prime numbers within 10 minus the largest two digits, the difference is______ ．
• 2. 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
• 3. Given that AB is prime and 3a + 2B = 2000, find the value of a + B
• 4. AB is prime, and the molecule of a / 1 + B / 1 is 30. How many pairs of AB are there?
• 5. Given that a, B and C are prime numbers, and a + B + C = 86, AB + BC + Ca = 971, find the value of ABC
• 6. In the quadrilateral ABCD, ∠ DAB = 60 °∠ DCB ° ad = AB, try to prove that the line CD BC AB can form a right triangle ∠DCB=30° ∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°∠DCB=30°
• 7. 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
• 8. 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.
• 9. Prime numbers within 20 Ah, different styles
• 10. The sum of all prime numbers within 20 is () A .76 B .77 C .78
• 11. The least common multiple of the three prime numbers is 42. The three prime numbers are (), (), ()
• 12. 16 = () + () = () + () prime
• 13. a. B are different prime numbers, and 1 / A + B / a = 20 / 91, what are a and B?
• 14. Known x, y, Z are real numbers, if x + y + Z ≠ 0, a = x / x + y, B = Y / Z + X, C = Z / x + y, find the value of a / A + 1, B / B + 1, C / C + 1, please answer in detail!
• 15. Given that the real numbers a, B, C and D are not equal to each other, and a + 1b = B + 1C = C + 1D = D + 1A = x, try to find the value of X
• 16. We define the symbol | a B | C D |, which means | a B | C D | = ad BC We specify the symbol | a B| |c d|, It means | a B| |c d| = ad-bc , For example, 1 2| |3 4| =1*4-2*3=-2 If | x + 1 2x| |2 / 3, 1 / 2 | = 1, Find the value of X
• 17. A. If B, C and D are four points in order on a straight line, and AC = 10, BD = 8, then the value of AB * CD + BC * ad is equal to____ .
• 18. Block determinant ABCD = ad BC M = matrix ABCD proves that | m | = | ad-bc | does not give whether AD two are invertible
• 19. ABCD, the absolute value of ABCD is divided by ABCD to get negative 1. Find the absolute value of a in a + B in B + C in C + D in D
• 20. The positions of rational numbers a and B on the number axis are shown in the figure. Now compare the sizes of a, B, C and D. the correct one is () ———┃—————————————┃————┃——————＞ a 0 b A,-a