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

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

Question 550550: if u go to the following website, it has the act practice science test. I need help on the following questions from the page and these questions are from the act practice booklet. I don't know how act got these answers so much help would be appreciated with showing work.
i don't know how it got the answer for the following questions on this science section.
3. d
4. f
6. f
7. c
8. j
10. j
https://docs.google.com/viewer?a=v&q=cache:IJcWZIWzbI4J:shsbio1.wikispaces.com/file/view/ACTScience.pdf+&hl=en&gl=us&pid=bl&srcid=ADGEESgjG6eGKED4dPd_CalM01gYk5fzPTrRWwUUe9OiiNIdK2CxJbyJmsWLHep07LEBkpgCnT0GjsBHoUHbjFc_Wedy5bOGGXGFfQ_r9NBqxEqtqzBPEPuiiHKlu-HFH55fQ4Pbop1_&sig=AHIEtbTtW8bDP48r2gGb2PrvuC93B1J4_A
thanks for ur help and god bless you.
Click here to see answer by fcabanski(874)

Question 551088: what are the steps and answer to 450 divided by 270
Click here to see answer by AnlytcPhil(1276)

Question 552210: What is the smallest number that has a remainder of 0 when divided by 16 and 36? I have listed the multiples of these two numbers out to see if they have a LCM, but I cannot seem to find one. I know that you can multiply if the two numbers are prime numbers to solve, but in this case they are not. Please help! I need this by tomorrow!
Click here to see answer by jim_thompson5910(28536)

Question 551436: Model each expression:
(t devided by 2) -4
How do you write this
Action 1
Action 2
We r confussed for thi and the next one which is subtraction
The example is (m x 4) + 7
Action 1 was 4 boxes with an m in each and action 2 is + 6
Click here to see answer by JBarnum(2044)

Question 543666: what is the largest 5 digit number that is divisible by 3
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Question 541813: What multiplied by what equals 174?
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Question 541225: Separate 75 into two numbers so that the sum of the two numbers equals 75. Three times the smaller number is five more than the larger number.
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Question 539852: How many integers between 1 and 200 are multiples of both 3 and 5 but not of either 4 or 7?
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Question 493228: What are the two smallest numbers with only 10 divisors?
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Question 513810: FIND AL NUMBERS LESS THAN 50THAT ARE PRIMES AND HAVE A REMAINDER OF 3 WHEN THEY ARE DIVIDED BY 7.
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Question 513810: FIND AL NUMBERS LESS THAN 50THAT ARE PRIMES AND HAVE A REMAINDER OF 3 WHEN THEY ARE DIVIDED BY 7.
Click here to see answer by MathTherapy(1422)

Question 553497: Find the greatest common divisor of 96 and 54.
Find the least common multiple of 30 and 42.
Click here to see answer by nyc_function(2733)

Question 553709: How to solve this problem 5\9of450
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Question 557800: What is the smallest number that can be divided by all the numbers 1 to 10?
Click here to see answer by Edwin McCravy(8896)

Question 558849: REMOVED FOR LANGUAGE
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Question 560364: A square has area 18225 square feet. What is the perimeter of the square. Could you please how me a step by step how to complete this problem
Click here to see answer by Earlsdon(6287)

Question 563311: Your task is to find two different numbers that sum to 1000 . One number must be a multiple of 19 and the number must be a multiple of 47 . Show or explain how you got your answer .
Click here to see answer by richard1234(5390)

Question 565188: i am a multiple of 5. two is not one of my factors. i am not prime and i am not square. i am less than 30. what number am i?

Click here to see answer by jim_thompson5910(28536)

Question 566460: Hey I am having problems with this just Prime Numbers what are all the prime numbers?
Click here to see answer by richard1234(5390)

Question 567583: The positive integer N has exactly eight different positive integral factors. Two of these factors are 15 and 21. What is the value of N?
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Question 572591: How to calculate the Multiplicative inverse modulo.
like how to calculate 7inverse mod (20). It will be helpful, if the solution or the method is calculative
Click here to see answer by stanbon(57290)

Question 572038: 406/6
Click here to see answer by bulls400(11)

Question 573634: What is a 4 digit natural number divisible by 4 but not by 8?
Click here to see answer by richard1234(5390)

Question 573634: What is a 4 digit natural number divisible by 4 but not by 8?
Click here to see answer by Alan3354(30993)

Question 578828: I have three factors. the sum of my factors is 7. What am I?
Click here to see answer by edjones(7569)

Question 580624: Prime factors for Mathematics have been likened to atoms in the study of matter. By comparison, discuss the importance of this.
Click here to see answer by dfrazzetto(277)

Question 581545: how do you solve 4(5x-2)=92

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Question 581552: 6z-6=12-9z
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Question 584220: simplify
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Question 587074: N to the second power=49 n=?

Click here to see answer by algebrahouse.com(1079)

Question 588005: Prove or disprove the following: The expression n2 – n +41 produces a prime number for every positive integer n. (Hint: try the following numbers 1, 10, and 41).
Click here to see answer by richard1234(5390)

Question 588799: Name a number that is >200 that is divisible by both 3 and 5.
What are the steps you take to solve this question?
Click here to see answer by solver91311(16877)

Question 589144: i have to know the definition of groups and EXAMPLES

Click here to see answer by richard1234(5390)

Question 591789: What is the smallest odd number you can obtain from the product
of four different prime numbers? Show or explain how you got
your answer.

Click here to see answer by solver91311(16877)

Question 592541: Find a value of n that makes the expression divisible by 2,3, and 5.
My problems are:
1. 9n+3
2. n-5
3. 5n
4. 2n-4
Click here to see answer by solver91311(16877)

Question 593323: What is the sum of all odd one digit prime positive numbers
Click here to see answer by Edwin McCravy(8896)

Question 595147: Formulas that yield prime numbers, for example: x squared - x + 41
Select 5 numbers for X,- 0 , two even, two odd- substitute them in the formula see if prime numbers occur. try to find a number for X that when substituted in the formula yields a composite number.
This might as well be in Greek to me...
Can you please help?

Click here to see answer by Alan3354(30993)

Question 596369: How to find the smallest prime number when there are more than one prime factors ?
Click here to see answer by richard1234(5390)

Question 597022: Hi. Can someone please teach me how to solve this question? It's quite easy but I want to know how. It would mean a lot. Thanks!
How many integers between 197 and 303 are divisible by 4 or 10?
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Question 597402: Write 250 as a product of prime numbers
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Question 597407: Write 360 as a product of prime factor
Click here to see answer by rapaljer(4667)

Question 599148: How do you know when it is divisible by 2,9,5,8

Click here to see answer by rfer(12655)

Question 599290: Try to find a number for x that when substituted in the formula X² - x + 23 yields a composite number.
Click here to see answer by jim_thompson5910(28536)

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