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

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

Question 276719: prime numbers between 16 and 54
Click here to see answer by user_dude2008(1861)

Question 277966: The sum of the digits in the smallest positive integer that is divisible by 2, 4, 6, 10, 12, and 14 is:
(A) 3 (B) 6 (C) 9 (D) 15 (E) 18
Click here to see answer by Edwin McCravy(8922)

Question 280578: What is -1 divided by -1? Please?!?
Click here to see answer by oberobic(2304)

Question 281667: i need help with this problem X squared -X - 12
Click here to see answer by Alan3354(30993)

Question 281667: i need help with this problem X squared -X - 12
Click here to see answer by jim_thompson5910(28598)

Question 281911: write the following number as a product of primes. 80
Click here to see answer by nabla(475)

Question 281880: Which number is a counterexample for the statement: If a is a prime number, then a is odd.
A)5 B) 4 C) 3 D) 2 E) 12

Click here to see answer by nabla(475)

Question 282014: what is the greatest common divisor of the number
104,405
Click here to see answer by solver91311(16897)

Question 282017: A STORE OWNER WISHES TO STACK BOOKS INTO EQUAL PILES, EACH PILE CONTAINING ONLY ONE TITLE. THERE ARE 30 BOOKS OF ONE TITLE AND 70 BOOKS OF ANOTHER TITLE IN A SHIPMENT. wHAT IS THE LARGES NUMBER OF BOOKS THAT CAN BE STACKED IN EACH PILE?
Click here to see answer by solver91311(16897)

Question 282015: NEED TO FIND LEAST COMMON MULTIPLE OF THE NUMBERS
105 AND 180
Click here to see answer by solver91311(16897)

Question 282011: 11,500
FIND THE PRIME FACTORIZATION OF THE COMPOSITE NUMBER

Click here to see answer by Mathematicians(84)

Question 278829: do i learn alot of stuff on this site ?
Click here to see answer by JBarnum(2044)

Question 278829: do i learn alot of stuff on this site ?
Click here to see answer by Alan3354(30993)

Question 277958: The prime factorization of 2000 can be written 2000 = 2^x 5^y.
The sum x + y equals
A.6 B.7 C.8 D9 E.10

Click here to see answer by JBarnum(2044)

Question 277302: 8.225/.035
Click here to see answer by JBarnum(2044)

Question 285321: DESCRIBE A SITUATION IN WHICH THE LEAST COMMEN MULTIPLE OF THE TWO NUMBERS IS ONE OF THE NUMBERS
Click here to see answer by richwmiller(9143)

Question 285529: How many positive integers below 2009 are divisible by both 4 and 6?
A. 502 B. 334 C. 167 D. 83 E. None of these.
Click here to see answer by Theo(3472)

Question 286011: Is the following set of numbers a perfect triple? 6, 8, 10
Click here to see answer by nabla(475)

Question 286764: If a divided by 4 leaves a remainder of 2 and b divided by 4 leaves a remainder of 3, then when a + b is divided by 4, the remainder is
A. 0 B. 1 C. 2 D. 3 E. 4
Click here to see answer by Edwin McCravy(8922)

Question 287848: one factor of x^3 + 2x^3 - 11x - 12 is x + 4. Find the remaining factors.
Click here to see answer by Edwin McCravy(8922)

Question 288318: find the smallest number which leaves remainder 8 and 12 when divided by 28 & 32, respectively.
Click here to see answer by richwmiller(9143)

Question 288317: the prime factors of 1058 are 2,2r-1,2r-1 Find "r"
Click here to see answer by checkley77(12569)

Question 288319: A positive number when divided by 35 gives the remainder 33. What will the remainder be if this number is divided by 7?
Click here to see answer by richwmiller(9143)

Question 288285: The sum of all the prime numbers which are greater than 6 and less than 37 is
(a) 121 (b) 137 (c) 150 (d) 177 (e\ 184

Click here to see answer by Alan3354(30993)

Question 288340: State whether 10.64 is rational or irrational. If yes, then express it in terms of p/q.
Click here to see answer by richwmiller(9143)

Question 288339: Is 2 route 45 + 3 route 20 divided by 2 route 5 rational or irrational?
Click here to see answer by richwmiller(9143)

Question 275844: I am trying to use Fermat's factorization technique to find the prime factorization of 1807. I am using the formula √(n^2- 1807)(square root). I have tried up to 167 and am having little luck. I would appreciate some help. Thank you
Click here to see answer by Alan3354(30993)

Question 289483: What is the smallest number divisible by three that is the sum of four distinct primes?
(a) 18 (b) 21 (c) 24 (d) 27 (e) None of the above

Click here to see answer by vleith(2825)

Question 289532: What is the smallest number that should be added to 1000 so that 45 divides the sum exactly?
Click here to see answer by richwmiller(9143)

Question 289718: What is the prime factorization of 385 Please show the steps
Click here to see answer by stanbon(57424)

Question 289718: What is the prime factorization of 385 Please show the steps
Click here to see answer by richwmiller(9143)

Question 290091: Find the quotient and remaineder when dividing by
I can't decide whether I am supposed to use long division (the two number divisor), or synthetic (the missing power). If using long, I am having a little trouble with the power divided by another power (the first part).

Click here to see answer by richwmiller(9143)

Question 290706: Solve using the addition principle graph and write set builder notation and interval notation for answer
3x < 2x + 7 the less than sign has a line under it

Click here to see answer by richwmiller(9143)

Question 291810: -8=z+32
Click here to see answer by checkley77(12569)

Question 292247: I don't understand how to determine whether a natural number is divisible.
In example: is 235 divisible by 2,3, 5?
Click here to see answer by Alan3354(30993)

Question 292247: I don't understand how to determine whether a natural number is divisible.
In example: is 235 divisible by 2,3, 5?
Click here to see answer by richwmiller(9143)

Question 292365: is 2 divisible by 32

Click here to see answer by Alan3354(30993)

Question 292557: How many prime numbers are exactly divisible by one?
Click here to see answer by Fombitz(13828)

Question 292557: How many prime numbers are exactly divisible by one?
Click here to see answer by jim_thompson5910(28598)

Question 292556: How many prime numbers are exactly divisible by three?
Click here to see answer by jim_thompson5910(28598)

Question 292555: How many prime numbers are exactly divisible by six?
Click here to see answer by jim_thompson5910(28598)

Question 294428: 5, 10 , 30, 286, ?
Which is the next number?
Click here to see answer by richwmiller(9143)

Question 294917: 16,10
3,6
8,12
36,60
15,75
11,18
20,15
10.14

Click here to see answer by Alan3354(30993)

Question 294917: 16,10
3,6
8,12
36,60
15,75
11,18
20,15
10.14

Click here to see answer by richwmiller(9143)

Question 295947: If n is any positive odd integer greater than 1, the n(n^2 – 1) is always divisible by:
(a) 7 (b) 5 (c) 24 (d) 15

Click here to see answer by richwmiller(9143)

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