# 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 600112: can you help me solve 50/80000 and can you show me a quicker way to solve it and can you show me how you done the working out. can you answer the question now. thnx....:) Click here to see answer by Alan3354(30993)

 Question 600447: 75=write the composite number as a product of prime numbers Click here to see answer by lynnlo(4164)

 Question 611475: i am a factor of 120, and a common multiple of 3, 4, and 10. The sum of my digits is 6. Click here to see answer by KMST(1874)

 Question 615553: I need help using modular arithmetic to find the last two digits of a big number, for example 142^291 or something. I know how to use modular arithmetic to find the units digit, but not the last two digits. I'm only a beginner at modular arithmetic, and would like to get better at it. Click here to see answer by jim_thompson5910(28598)

 Question 616103: "How many distinct factors of 1,600 are perfect cubes?" The options are-(i)3 (ii)4 (iii)6 (iv)2 " Click here to see answer by richard1234(5390)

 Question 618064: How many positive integers have exactly 3 proper divisors, each of which is less than 50? ( A proper divisor of a positive integer n is a positive integer divisor of n other than n itself.) Click here to see answer by Edwin McCravy(8909)

 Question 618067: A positive integer n has exactly 4 positive divisors that are perfect fifth powers, exactly 6 positive divisors that are perfect cubes, and exactly 12 positive divisors that are perfect squares. Find the least possible number of possible integers that are divisors of n. Click here to see answer by Edwin McCravy(8909)

 Question 618060: A positive integer n has 60 divisors and 7n has 80 divisors. What is the greatest integer k such that 7^k divides n? Click here to see answer by richard1234(5390)

 Question 618063: Find the number of positive integers that are divisors of at least one of 10^10, 15^7, 18^11. Click here to see answer by Edwin McCravy(8909)

 Question 619030: Hello, I would like it very much if you took off the pages of advertising with me on it. Unless you speak with me first. Thank You, Donna Cowan Click here to see answer by Alan3354(30993)

 Question 621062: if 12 denotes the area of a rectangle , in how many ways can this rectangle be drawn ? Click here to see answer by KMST(1874)

 Question 624401: How many ways are there to choose two distinct numbers from {1,2,3,...,10} such that their product minus their sum is a multiple of 3? Click here to see answer by KMST(1874)

 Question 626754: suppose and b are integers such that 2+a and 35-b are divisible by 11prove that a+b is divisible by 11 Click here to see answer by Alan3354(30993)

 Question 627074: What are the prime factorizations of 33^4*39*4^14 I'm am completely confused on how to find this. Could someone please help me? It would be greatly appreciated. Click here to see answer by jim_thompson5910(28598)

 Question 627266: Tell me the difference between prime & twin prime no. Also introduce me with all the divisibility tests. Click here to see answer by solver91311(16897)

 Question 629315: what number is greater than 200, less than 300 and is dividible by7 and 9 Click here to see answer by solver91311(16897)

 Question 632091: what is the largest prime numbers and give the steps? Click here to see answer by Edwin McCravy(8909)

 Question 636378: I am an odd number I am not divisible by 5 I am more than 20 but less than 50 I am divisible by 9 what number am I???? Click here to see answer by solver91311(16897)

 Question 637673: How many prime numbers are there whose squares are less than 250? And please could you explain how you got your answer? I tried finding the number that has a square root of 250 and finding all the prime numbers less then that but that didn't work. I have no other idea what to do to solve this problem. Please help me. Click here to see answer by ewatrrr(10682)

 Question 639321: 840.9744/12.96 Need the process to help my son Click here to see answer by MathLover1(6638)

 Question 640437: 14/39 * 3/4=? I'm having problems with the factoring and how to come up with the correct factorization to solve the problem. Click here to see answer by Alan3354(30993)

 Question 632558: Find the smallest number which when added to 2000 is exactly divisible b 10,20 and 30? Click here to see answer by killer6678(69)

 Question 570582: 3/8 PLUS 14/15 DIVIDED BY 5/3 TIMES 25/4 Click here to see answer by killer6678(69)
 Question 570582: 3/8 PLUS 14/15 DIVIDED BY 5/3 TIMES 25/4 Click here to see answer by MathTherapy(1425)

 Question 533190: what is the prime numbers between 6 and 20? Click here to see answer by killer6678(69)

 Question 642318: what sum or difference is equivalent to the expression? 3x-2 over 9 Click here to see answer by Edwin McCravy(8909)

 Question 642317: what is an algebraic expression for the word phrase: the quotient of 8 and the difference of x and m Click here to see answer by solver91311(16897)

 Question 642482: What is the prime factorization of 100 Click here to see answer by Edwin McCravy(8909)

 Question 643542: If the numbers 70 and 105 are both multiples of a prime number n, how many possible values are there for n? Click here to see answer by Edwin McCravy(8909)

 Question 645461: Read and answer each question. 1. What is the product of 5 and the sum of all the prime numbers that are less than 10? 2.What is the difference between the greatest prime number that is less than 60 and the least prime number? 3. Add all the prime numbers between 60 and 70. what is the sum? 4.What number represents the prime factorization. 2.2.2.7.3.3.3.5? 5.What is the prime factorization of the sum of all prime numbers between 40 and 50? Click here to see answer by Alan3354(30993)

 Question 647140: the sum of my digits is 3. One of my factors is 7. What number am I. Click here to see answer by colliefan(239)