# Questions on Algebra: Divisibility and Prime Numbers answered by real tutors!

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 Algebra: Divisibility and Prime Numbers Solvers Lessons Answers archive Quiz In Depth

 Question 12384: Factor as completely as possible. If not possible to factor then write "Prime 6vw + 18v - 7w - 21= Click here to see answer by Earlsdon(6294)

 Question 12934: All that I have to do is factor this but I think that it is prime. Can someone please tell me if I am right? Thank you. 15x^2+16x+4 Click here to see answer by Earlsdon(6294)

 Question 13138: how we can find prime factors of numbers Click here to see answer by glabow(165)

 Question 13291: How do you figure out the set of numbers when given the GCF? For example, the GCF of two numbers is 850. Neither number is divisible by the other. What is the smallest that these two numbers could be? (This is for a 6th grade math class.) In addition, what guidelines apply when one number is even and the other odd, or both numbers are even/odd. I have been searching the net, but can only find out how to determine the GCF...not the other way around. Thank you! Click here to see answer by greatscot(1)

 Question 13382: if 2x+1 is a multiple of 5,and if 2x+1<100, how many possible values of x are prime numbers Click here to see answer by khwang(438)

 Question 13478: Could you tell me how to use prime factorization becausem i do not understand how to do it like say for example like 525 how could i turn that in to a prime factorization Click here to see answer by Earlsdon(6294)

 Question 14801: what is 36 as a product of prime numbers? Click here to see answer by Earlsdon(6294)

 Question 15232: what is the prime factorization in expanded form of 27 Click here to see answer by jb007mi6(53)

 Question 15246: find 3 consecutive even integers such that the sum of the first three is 24 more than the fourth Click here to see answer by kunal_122(19)

 Question 10037: If n is an odd integer, which expression always represents an odd integer? Click here to see answer by xcentaur(357)

 Question 17726: I'm trying to help my son, 6th grade, with his home work. Could use any help you have to offer. When multiplying the greatest common factor (GCF) and the least common multiple (LCM) of two numbers the product is always equal to the product of the original two numbers. Why? Is there an easy to say theorem or "rule" that you could share. What we came up with: The least commom multiple and the greatest common factor are common to the two numbers. Because they are the smallest and the largest common numbers, when they are multiplied their product is equal to the product of the original two numbers. Click here to see answer by ivy12003(22)

 Question 18104: Need help with 6th grade school project.Other students have to guess the secret number each clue must begin with "I am" and end with "Who am I?" Example: Who am I? I am a composite number, but I look prime. I am less than 60. The sum of my digits is 6. I am divisible by 17. Who am I? Click here to see answer by pwac(253)

 Question 18692: What is the smallest prime factor of 1821 Click here to see answer by venugopalramana(3286)

 Question 19023: Does there exist a two-digit number 'ab' such that the difference between 'ab' and its reverse 'ba' is a prime number? Click here to see answer by MelanieBCC(40)

 Question 20052: I can't seem to find the prime factorization of 1,120 can you help?????????????????????????????????????????????????????? Click here to see answer by elima(1433)

 Question 20179: HOw many distinct prime numbers are factors of 70? Click here to see answer by Earlsdon(6294)
 Question 20179: HOw many distinct prime numbers are factors of 70? Click here to see answer by christinaaa192(28)

 Question 20525: the number 462 is divisible by which of the following??? a.10 b.6 c.none of these d.5 Click here to see answer by kcrawford(3)

 Question 20523: the number 64 is divisible by which of the following? a.6 b.3 c.4 d.5 Click here to see answer by kcrawford(3)

 Question 20524: choose a tens digit for 2?6 so that the three-digit number is divisible by 6. a.1 b.3 c.2 d.0 Click here to see answer by Earlsdon(6294)

 Question 21792: How many factors, including 1, does the product of the first 9 primes divided by the product of the first seven primes have? I think the answer is 7 Click here to see answer by AnlytcPhil(1278)

 Question 21796: What is the sum of the digits used to form the integers from 45 to 100 , inclusive? I thought it was 45+55 Click here to see answer by AnlytcPhil(1278)

 Question 23233: How many subsets of 3 different integers are there whose sum is divisiable by 4? Click here to see answer by stanbon(57967)

 Question 18148: Is there any square number besides 9 and 81 that is divisible by 9? -Thanks! Click here to see answer by kev82(148)

 Question 25693: Do you have a list of prime numbers up to 1000? Click here to see answer by Earlsdon(6294)