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

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

Question 620361: I'm the smallest composite; my friend the smallest prime ; our product has a factor tree ; as small as the smallest odd prime ; who are we ?

Click here to see answer by tommyt3rd(5050)

Question 659438: this formula x^2-x+41=
Select 0,1,2,3,4 use these numbers for x substituting them in the formula and see if prime numbers occur. Try to find the number for x that when substituted in the formula yields a composite number.
Click here to see answer by tommyt3rd(5050)

Question 616631: what is -3x divided by (-3/17)
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Question 638538: Find the prime factorization, GCF, and LCM for each group of monomials.
A) 6, 12, 30
B) 9x^2, 5xy, 3xy^2
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Question 643895: if n is an integer greater then 1, such that n divided by 4 yields a remainder of 0, which of the following could be a prime number?
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Question 710956: If you have the following numbers ,3,4,6,7,8 how do you get the answer 263??? Please help
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Question 645809: (4/2/3) + (3/2/4)
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Question 614031: This one has me stumped!!
24-3[15+(-3)] in my book it has this....
over -2 + -4 (I guess this means divided by..??)
Click here to see answer by tommyt3rd(5050)

Question 600885: The population P of a city if given by
P=2500e^(kt)
where t is time of the years , with t=0 corresponding to the years 1980 .In 1935 ,the population was 3350 .Find the value of k and use this result to predict the population in the years 2000
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Question 591438: Factor 360x5y-180x4y-90x3y
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Question 591437: Find the GCF of 360x5y and 450x6y
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Question 645409: Build a factor tree to get the prime factorization of each number.
1. 280
2. 145
3. 117
4. 159
5. 134
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Question 585472: F the value of the given expression.70-10.7
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Question 582664: 16j^2-8j^6k^5+60j^3
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Question 643839: Please help me solve this:
Y=-4x-10
For all prime numbers less than 15
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Question 603801: For the numbers below write their prime factorization and compute their gcd and lcm:
(i) 831600 (ii) 70560

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Question 577062: when y=3, which of the following is false?
y is prime and y is odd
y is odd or y is even
y is not prime and y is odd
y is odd and 2y is even
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Question 645411: Please answer this. Use continuous division to get the prime factorization of each number.
1. 1432
2. 4239
3. 9125
4. 6012
5. 1029
6. 1260
7. 2322
8. 4986

Click here to see answer by tommyt3rd(5050)

Question 645405: Pls.answer this. Use continuous division to get the prime factorization of each number.
1. 1432
2. 4239
3. 9125
4. 6012
5. 1029
6. 1260
7. 2322
8. 4986

Click here to see answer by tommyt3rd(5050)

Question 763360: What should be the smallest digit in place of *, if the number is to be divisible by 3.
A) 24, * ,75
Click here to see answer by Alan3354(69443)

Question 764659: What is the remainder of 16,246 divided by 9?
Click here to see answer by josgarithmetic(39616)

Question 764659: What is the remainder of 16,246 divided by 9?
Click here to see answer by MathLover1(20849)

Question 764663: im confused with prime numbers and i need help fast im starting 6th grade!!!!!!!!!!!!!!!!!!!!
Click here to see answer by josgarithmetic(39616)

Question 764663: im confused with prime numbers and i need help fast im starting 6th grade!!!!!!!!!!!!!!!!!!!!
Click here to see answer by MathTherapy(10551)

Question 764863: the prime factors of a two digit number are 5,2 and 7 what is the number??
Click here to see answer by ramkikk66(644)

Question 764861: the prime factors of a two igit number are 5,2 an 7 what is the number??
Click here to see answer by ramkikk66(644)

Question 574881: I need some help solving this problem please...I got 2(p+5)/4(p-5)
2p^2+14p+20/4p^2-12p-40
Click here to see answer by tommyt3rd(5050)

Question 766365: What is the least five-digit number which is divisible by 8, 9, and 12?
Click here to see answer by stanbon(75887)

Question 766834: what do you get when 3 is divided by n equals 20

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Question 769969: There is a specific number of pens available for three students. The first student takes one third of the pens, the second student also takes one third of the pens and the third student takes one third of the remaining third of the pens. The students distribute the remaining pens evenly among each other. What was the initial total number of pens?
Click here to see answer by ramkikk66(644)

Question 770736: If g(x)=3x-5, determine the function of � for which g(�(x))=15x^2-6x+4.
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Question 771879: Please help me divide 6526 by 25 using the long division method and please explain and show working.
Click here to see answer by Alan3354(69443)

Question 774263: A math textbook company made 210 textbooks. Each book had 36 pages. How many pages were printed? Please show work.
Click here to see answer by Cromlix(4381)

Question 778575: a lock can only be opened by using a 3-digit number. Saqi sets this 3-digit number to be the largest prime number under 1000. what is the number?
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Question 781924: how do i find the quotient of 204 and 12 ?
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Question 785202: how many prime factors are their of number 666666 ?
Click here to see answer by Edwin McCravy(20054)

Question 785747: When 391758 and 394915 are divided by a certain three digit number, the three digit remainder is the same i each case. Find the divisor.
Click here to see answer by mananth(16946)

Question 786566: What is the smallest number that has 2,3,4,5 and 6 as factors ?
Click here to see answer by Edwin McCravy(20054)

Question 786566: What is the smallest number that has 2,3,4,5 and 6 as factors ?
Click here to see answer by dfollett76(12)

Question 790622: What is the least common multiple(LCM) of 18 and 8?
A. 8
B. 438
C. 864
D. 1,000

Click here to see answer by jim_thompson5910(35256)

Question 792475: Hi, I'm stuck with this problem... I don't really know how to tackle it. So if you can help me that'd be much appreciated.
Let a be a non-negative integer, written in standard decimal notation as
akak−1 . . . a2a1a0, where 0 ≤ ai ≤ 9 for i = 0,1, . . . , k. Prove that a is
divisible by 8 if, and only if, 4a2 + 2a1 +a0 is divisible by 8.
Click here to see answer by KMST(5328)

Question 792481: What is the largest five-digit number that is divisible by 3 ?

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Question 792544: How do I find the divisibility pattern for 156
Click here to see answer by josgarithmetic(39616)

Question 794531: I am having a serious brain freeze.
The results to a question that I had was X=91/26 and that is 350 on a calculator. I need to compute this by hand and it appears I cant do simple division any more. I know that 91 can only go into 260 twice because 91 times 3 is 273. Please let me know what elementary step that I am missing.
Click here to see answer by Alan3354(69443)

Question 796952: which of the following can be divided by 2 but not by 10
Click here to see answer by solver91311(24713)

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, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295