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And are two different primes of 36. The maximum product is______ The minimum product is______ ．
According to the meaning of prime numbers, among the two different prime numbers whose sum is 36, the closest ones are 17 and 19; the greatest difference is 3 and 33. Then the maximum product is 17 × 19 = 323; the minimum product is 3 × 33 = 99
If the sum of the three primes is 26, what is the minimum and maximum product of the three primes?
According to the stem analysis, we can get: the sum of three prime numbers is even, therefore, one prime number must be even, that is, at least one 2. So the sum of the other two prime numbers is 24, and the prime numbers less than 24 are 2, 3, 5, 7, 11, 13, 17, 19, 23; (1) when the three prime numbers are 2, 5, 19, the minimum product is 2 × 5 × 19
The sum of two primes is 1995. What is the product?
The sum of two prime numbers is 1995. What is the product of these two prime numbers?
If the sum of two primes is odd, then one must be even and the other odd
Even numbers can only be 2
So, the product of two primes = 2 * 1993 = 3986
For a ring, the perimeter of the outer ring is 12.56 decimeters, the diameter of the inner ring is 2 decimeters, and the area of the Chinese ring is ()
The area of the middle ring is (9.42 square decimeters)
The process of solving the problem is as follows:
The perimeter of the outer ring is 12.56 decimeters, (perimeter L = π D, d = l △ π)
The diameter of the outer ring is d = 12.56 △ 3.14 = 4 decimeters
Radius of outer ring = 4 △ 2 = 2 decimeters
Radius of inner ring = 2 △ 2 = 1 decimeter
The area of the middle ring s = the area of the outer circle - the area of the inner circle
S = π × 2 × 2-1 × 1 × π = 3 π ≈ 9.42 square decimeter
Simple calculation of 7.8 times 3.2 plus 7.8 times 7.8 minus 7.8
The original formula = 7.8 × (3.2 + 7.8-1) = 7.8 × 10 = 78, hope to help you, please accept in time, your adoption is the driving force of my answer!
Multiplication and division of mathematical fraction 3AB ／ a square of 4B × a-2b ／ ab
Finally, we need to simplify and complete, wrong. Is the square of a divided by the square of a-4b multiplied by the square of AB divided by a-2b
=The square of 3B / a-16ab-2 / A
=The square of 3a-2 / a-16ab
=Square of 16ab + 3ab-2a
Three different numbers a, B and C make up six different three digit numbers. The sum of them is equal to 4440. What is the largest number
a+b+c=4440÷(100+10+1)÷2=20
So the maximum number is 983
Hope to help you, I use a mobile phone, can not receive follow-up, if you have any questions please send me a short message, or help can also ha~
On the addition, subtraction and elimination methods of quadratic equations of two variables
Some problems can not be directly added or subtracted, and the elimination should be done through deformation
It's like 1 × 3. I don't know why I multiply by 3
It seems that we are looking for some least common multiple
For example, how to solve the group 4x + 3Y = 20 and 9x + 4Y = 30?
If you want to eliminate y in two formulas, you have to make the coefficients in front of Y in the two formulas equal, and then subtract them. 4x + 3Y = 20 * 4 becomes 16x + 12Y = 80, 9x + 4Y = 30 * 3 becomes 27x + 12Y = 90
Grade 6 Volume 1 math homework 47 pages
(1) 15% (2) 85000 × 5% = 4250 yuan (3) 1020 △ 85% = 1200 yuan (4) 2800-2000 = 800 yuan 800-500 = 300 yuan 500 × 5% = 25 yuan 300 × 10% = 30 yuan 25 + 30 = 55 yuan (5) 1__ Go to supermarket B for 99 yuan, and go to supermarket a for more than 100-160 yuan
A reservoir is 6 meters long, 4 meters wide and 2 meters deep. How many square meters does it cover? How many liters can it hold at most? If cement is applied around and at the bottom,
How many square meters is the area of cement?
A cistern is 6 meters long, 4 meters wide and 2 meters deep
Floor area = 6x4 = 24m2
Maximum capacity = 6x4x2 = 48m3
If you cement the sides and the bottom,
Area of wet cement = 6x4 + (6 + 4) x2x2 = 64m2
Benefactor, I see your bones are strange,
He is a man of noble bearing and wisdom,
He is a unique talent in the Wulin
If you devote yourself to study, you will become a great tool in the future,
I have a little test, please click next to the answer
"Choose as satisfactory answer"
RELATED INFORMATIONS
- 1. The sum of the two primes is 2001, and the product of the two primes is______ ．
- 2. The product of two primes is 94, and the sum of the two primes is______ ．
- 3. The sum of the two primes is 2001, and the product of the two primes is______ ．
- 4. There are two prime numbers. The sum of them is 8, and the product is 15. What are the two prime numbers
- 5. It is known that a, B and C are prime numbers greater than 3, and 2A + 5B = C (1). This paper proves that there is a positive integer n > 1, so that the sum of a + B + C of all three prime numbers a, B and C satisfying the problem is equal It is divisible by n; (2) Find the maximum value of N in the above question
- 6. Let a be a prime number, B be a positive integer, and 9 (2a + b) (2) = 509 (4a + 511b) How to solve the problem 509 is a prime number, 2A + B is an integral multiple of 509, let 2A + B = 509k (k is an integer) Substituting, 9kk * 509 * 509 = 509 (509B + 2 * 509k) 9KK=b+2K=509K-2a+2K 2a=(511-9K)k Because a is a prime number, k = 1 or 511-9k = 1 (k is not equal to integer, exclusive) or K = 2 (a = 493 = 17 * 29, non prime, exclusive) or 511-9k = 2 (k is not integer, exclusive) So k = 1, a = 251, B = 509-2 * 251 = 7 There are a few things I don't understand 2a=(511-9K)k Why is k = 2 or (511-9k) = 2 or K = 1 or (511-9k) = 1 because a is prime How to verify "when 3 ≤ x ≤ 56, a must be a composite number", just write the above formula Is it unnecessary to say (511-9x) = 1 or = 2?
- 7. Let a be a prime number, B be an integer, and 9 (2a + b) (2a + b) = 509 (4a + 511b), find the values of a and B
- 8. Explanation: how many divisors of 360? What is the sum of these divisors?
- 9. What are divisors and prime numbers?
- 10. Is 19930607 prime? Is the divisor of 19930829 prime
- 11. The sum of the three primes is 50. What is the maximum product of the three primes?
- 12. The sum of two prime numbers is 60. What is the minimum value of the product of the two prime numbers
- 13. If a is a natural number greater than 1, then the square of a must be () A. prime B. composite C. odd D. even
- 14. Which three prime numbers multiply to get 15? 22? 42? 50? 63?
- 15. Fill in the appropriate prime numbers in the brackets below 20=（ ）+（ ）=（ ）-（ ） 26=（ ）+（ ）=（ ）+（ ）+（ ） 50=（ ）+（ ）=（ ）+（ ）+（ ）
- 16. Put the proper prime number in the brackets 8=( ）+( ) 18=( )+( )
- 17. Fill in the appropriate prime number in brackets: 6 = () + (). If you are a friend, please help!
- 18. Put primes in parentheses A two digit number in which the number on the tenth digit is 2 larger than that on the single digit, and it is also a multiple of 2 and 3. This number is ()
- 19. Take any two numbers from 22, 28, 38 and 55, and what reciprocal numbers can they form? Please list them all
- 20. The sum of two prime numbers is 16 and the product is 55. These two numbers are () and ()