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

Tutors Answer Your Questions about Divisibility and Prime Numbers (FREE)

Question 32007: Express 54 as a product of prime numbers.
Click here to see answer by venugopalramana(3286)

Question 32082: A whole number is divisible by 3 if the sum of its digits is divisible by 3?
Click here to see answer by Earlsdon(6287)

Question 32303: if T =3ph +5 Find T when p =4 and h = 2
Click here to see answer by mukhopadhyay(490)

Question 32496: we need an example of primefactorization.
Click here to see answer by benni1013(197)

Question 32497: primefactorization...............the problem is...............52
Click here to see answer by ikdeep(226)

Question 32654: with the number 18 which number is divisible by 2, 3, 5, 9, or 10.

Click here to see answer by Earlsdon(6287)

Question 33205: 30 can be divided by ?
Click here to see answer by piglet162431(90)

Question 33245: 1. What is the prime factorization of 598?
2. Choose the correct statement? 12 is a factor of 4; 30 is a factor of 7; 7 is a factor of 30; 4 is a factor of 12.
3. Which of the following shows a pair of prime numbers? 21,33; 21,59; 59,73; 33,73.
4. Write the prime factorization of 120?
5. Which of the following numbers is not composite? 31,39, 35, 27
6. Determine the prime factorization of 3960?
7. What is a factor of 40?
8. What is a factor of 12?
9. Which is not a factor of 12? 3, 24, 4, 6
10. Which of the following numbers is prime? 51, 57, 97, 27
11. Which is not a factor of 48? 12, 24, 96, 16
12. Write 900 as a product of primes?
13. Write 2016 as a product of primes?
14. Which of the following numbers is prime? 15, 21, 83, 25
15. Which of the following numbers is prime? 10, 3, 21, 4
Click here to see answer by longjonsilver(2297)

Question 34044: one quart of paint is exactly enough for two coats of paint on a 9foot by 10 foot wall how many quarts of paint are needed to apply one quart of paint to a 10 foot by 12 foot wall?
Click here to see answer by mukhopadhyay(490)

Question 16846: What is the divisibility of 126?
Click here to see answer by scoop(27)

Question 16846: What is the divisibility of 126?
Click here to see answer by Prithwis(166)

Question 35829: (1) 6.8cm= how many mm?
(2) 10mm= how many km.?
(3) 0.14mm = how many m.?
(4) 5dm = how many cm?
(5) 0.89cm= how many km?
Click here to see answer by rapaljer(4667)

Question 36003: factor the quadratic expression completely, and find the roots of the expression.
20x^2 + 13x + 2
Click here to see answer by checkley71(8403)

Question 36211: a) For any prime p>=5, prove that p2+2 ( P square +2) is composite or not.
b) Find the smallest number n, which has the following properties:
1).Its decimal represenation has 4 as the last digit;
2).It is divisible by 3 and 8.
3).Its a square number
Click here to see answer by venugopalramana(3286)

Question 36565: solve:
20 over x = 20 over x-4 + 4 over x
show work
Click here to see answer by stanbon(57203)

Question 36307: a) What is the remainder left after dividing
1! + 2! + 3! +…………………+ 100! by 7?

b) If n >=4 then find whether 2.n is less than 4.n or not.

Click here to see answer by venugopalramana(3286)

Question 36731: I am trying to help my child complete an extra credit paper from edHelper.com but I cannot find any info on how to work this out. It's like you need to work backward instead of forward to get it, but after several hours, we just can't figure it out! Thanks for any help you can offer.
"Identify two numbers whose GCF is 12 and whose LCM is 396. Describe how you found the number."
Click here to see answer by venugopalramana(3286)

Question 38090: which of the following numbers are composit?
0, 1, 15, 19, 23, 31, 49, 55, 59, 87, 91, 97, 103, 105
Click here to see answer by fractalier(2101)

Question 38153: Find two factors of 28 with a sum of 11
Click here to see answer by checkley71(8403)

Question 38159: What is the greatest common factor for each of the following groups of numbers:
36, 72 and 144
Click here to see answer by checkley71(8403)

Question 38159: What is the greatest common factor for each of the following groups of numbers:
36, 72 and 144
Click here to see answer by AnlytcPhil(1276)

Question 38198: Evaluate the following. Be sure to use the proper units.
5 lb/ft X 3 ft
Click here to see answer by fractalier(2101)

Question 38225: Evette has 41 1/2 ft. of string. She wants to cut it into pieces 3 3/4 ft. long. How many pieces of string will she have? How much string remains, if any?
Thanks!
Click here to see answer by Nate(3500)

Question 38235: write this fraction in simplest form:

42/55 = ?
Click here to see answer by mszlmb(115)

Question 38236: How do you change this fraction to an improper fraction?

13 2/5
Click here to see answer by stanbon(57203)

Question 38241: Divide this problem in simplest form:

3/4 divided by 9
Click here to see answer by lyra(94)

Question 38243: divide this problem in simplest form:
5 1/2 divided by 2 2/5
Click here to see answer by stanbon(57203)

Question 38243: divide this problem in simplest form:
5 1/2 divided by 2 2/5
Click here to see answer by lyra(94)

Question 38254: Divide this problem in simplest form:
5 1/3 divided by 2 2/5
Click here to see answer by lyra(94)

Question 38226: A computer can execute 36 instructions per microsecond. How many instructions can it execute in 4 minutes?
Thanks!
Click here to see answer by lyra(94)

Question 38224: A piece of land measures 3 3/4 acres and is for sale at $60,000. What is the price per acre?
Click here to see answer by lyra(94)

Question 38223: Divide. Write result in simplest form:
3/4 divide by 9

5 1/3 divided by 2 2/5
2 problems to resolve
Thanks
Click here to see answer by fractalier(2101)

Question 38393: Can you list the factors of the number 8?
Click here to see answer by fractalier(2101)

Question 38394: Can 89/13, 151/11 or 223/23 be simplivied?
Click here to see answer by fractalier(2101)

Question 38395: How do you change 3 2/5 to an improper fraction?
Click here to see answer by fractalier(2101)

Question 38396: How do you change 28/9 to a mixed or whole number.
Click here to see answer by fractalier(2101)

Question 38396: How do you change 28/9 to a mixed or whole number.
Click here to see answer by Nate(3500)

Question 38391: What is the product of 126 and 604
Click here to see answer by fractalier(2101)

Question 38404: What is the prime factorization of the number 20
Click here to see answer by fractalier(2101)

Question 38404: What is the prime factorization of the number 20
Click here to see answer by Nate(3500)

Question 38409: List the factors of the number 27.
Click here to see answer by Nate(3500)

Question 38409: List the factors of the number 27.
Click here to see answer by fractalier(2101)

Question 38410: List all the prime numbers between 45 and 80.
Click here to see answer by fractalier(2101)

Question 38407: At lunch, 7 people out of a group of 14 had hamburgers. What fraction names the part of the group who had hamburgers? What fraction names the part who did not have hamburgers?
Click here to see answer by Nate(3500)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395