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

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

Question 55192: Factoring Intergers
factor 140 in to the product of primes.
find the GCF for 40, 160, & 72.
Round to the nearest tenth.
Click here to see answer by funmath(2933)

Question 55696: 125x^3+8y^3
Click here to see answer by tutorcecilia(2152)

Question 56046: what are prime factors of
1230186684530117755130494958384962720772853569595334792197322452151726400507263657518745202199786469389956474942774063845925192557326303453731548268507917026122142913461670429214311602221240479274737794080665351419597459856902143413
Click here to see answer by aaaaaaaa(138)

Question 56322: Find the GCF for 25, 35, and 45
Click here to see answer by funmath(2933)

Question 56533: i have to show whether the following numbers are divisible by 2,3,or 5...The work needs to be shown. the numbers are 925, 165,351, and 1,495
Click here to see answer by funmath(2933)

Question 20789: I need to know the positive factors for the following:: 32,37,53,108, and 157. i have 1 and the number but i don't know how to get the other ones! Please help me!
Click here to see answer by BGluvsmath(64)

Question 20785: I am trying to find the positive factors for 32,37,53,108, and 157 I have no idea what they are? all i know is 1 and the number . . . . could you help me?
Click here to see answer by BGluvsmath(64)

Question 56801: 15y-30. Solve by find the larger common factor.
Click here to see answer by funmath(2933)

Question 57089: What is the largest known prime number
Click here to see answer by stanbon(75887)

Question 57181: Someone please clarify:
FIND THE PRIME FACTORIZATION OF 40?
I CAME UP WITH 2*2*2*5 IS THAT RIGHT? THANKS
Click here to see answer by stanbon(75887)

Question 57237: which of the following statement is true:
1. a number divisible by 6 is also divisible by 3
2. a number divisible by 3 is also divisible by 9
3. a number divisible by 5 is also divisible by 10
4. a number divisible by 3 is also divisible by 6
Click here to see answer by funmath(2933)

Question 53040: The Least Common Multiple of 12 and 18 is a divisor of both numbers.
a. True
b. False

Click here to see answer by BGluvsmath(64)

Question 53042: The Greatest Common Factor of two different integers must always be smaller than at least one of those numbers.
a. True
b. False

Click here to see answer by BGluvsmath(64)

Question 45677: Can someone help me with this problem?
I need to find the prime factorization of this number:
90
Thanks,
sher
Click here to see answer by BGluvsmath(64)

Question 57772: Please Help-I'm not sure how to factor this:
4(a-b)^2+7(a+b)
Click here to see answer by oberobic(2304)

Question 59052: What is a five-digit number divisible by both 2 and 5?
What is a three digit number divisible by 2 and not 4?
What is a three-digit number not divisible by 2, 3, or 5?
Click here to see answer by funmath(2933)

Question 60082: I need help on factoring this monomial:
Click here to see answer by funmath(2933)

Question 60151: Can someone help me?
I need to find the prime factorization of 140.
Thanks,
Ashley
Click here to see answer by funmath(2933)

Question 60150: Does anyone know this?
Is 31 a composit number
(A) true
( B) False
Thanks,
Ashley
Click here to see answer by funmath(2933)

Question 60202: Can someone help me on this problem?
The sum of two numbers is 33. Their difference is 11. What are the two numbers?
Thanks,
Ashley
Click here to see answer by checkley71(8403)

Question 61227: 6x-42+xy-7y
Click here to see answer by funmath(2933)

Question 61880: find the LCM for 4 and 20
Click here to see answer by funmath(2933)

Question 61838: 21a^3b^2c^4, 28a^2b^3c^6, 32ab^4c^5 I need help with this problem
Click here to see answer by funmath(2933)

Question 61789: Use the clues to find the missing numbers.(Clue) The greatest common factor (GCF) of two numbers is 6.
Click here to see answer by funmath(2933)

Question 62072: Please help me solve this homework problem. The least common multiple of 2 numbers is 3780, and the greatest common factor is 18. Given that one of the numbers is 180, what is the other number?
I started out by 3780/180= 21. But 18 is not a factor of 21? What am I doing wrong?
Thanks!
Laura
Click here to see answer by joyofmath(189)

Question 62387: Is 44 or 56 a prime number?
Click here to see answer by funmath(2933)

Question 58068: odd integer +odd integer=even integer
Click here to see answer by mystic1306(20)

Question 12938: Did I factor this correctly?...I have no idea how to do this so I guessed.

I factored that to:
Thank you
Click here to see answer by mystic1306(20)

Question 58066: Wright an equasion and solv to answer each question.
Seven times a number decreased by 2 is 19. What is the number.
Click here to see answer by mystic1306(20)

Question 62457: find two prime numbers that, if multiplied, woild generate a 400-digit number
Click here to see answer by joyofmath(189)

Question 62718: Find the GCF of 6, 18, and 30.
Click here to see answer by Cintchr(481)

Question 62715: Find the GCF for 32 and 37.
Click here to see answer by 303795(602)

Question 63103: 7x^2 -175
Click here to see answer by funmath(2933)

Question 63633: please help me to divdie :
4x^3 + 3 by a - 1 and check
thank u
Click here to see answer by stanbon(75887)

Question 63944: please help solve
factor out the greatest ommon factor. Simplify if possible.
5(2-x)^2-(2-x)^3+4(2-x)

Click here to see answer by funmath(2933)

Question 64112: please help me solve
factor the trinomial
-6m^2-13m+15
i keep getting
(m+3)(-6m+5) the answer says -(6m-5)(m+3)
Click here to see answer by Earlsdon(6294)

Question 64110: please help solve
factor by grouping
4+xy-2y-2x
i am not sure how you know how to pair them up
Click here to see answer by Earlsdon(6294)

Question 63855: Divide 3x^3 - 5 by x - 1 and check

Click here to see answer by ankor@dixie-net.com(22740)

Question 64129: please help me to divide the following :
3x^3 - 5 by x - 1 and check
Click here to see answer by stanbon(75887)

Question 64277: Find the prime factorization of 40
Click here to see answer by funmath(2933)

Question 64789: please help solve
Factor by grouping
r^2-9TW+3RW-3RT
Click here to see answer by 303795(602)

Question 64804: please help.
factor the trinomial
-p^2=12p+27
having trouble when there is a negative number involved
Click here to see answer by Earlsdon(6294)

Question 64804: please help.
factor the trinomial
-p^2=12p+27
having trouble when there is a negative number involved
Click here to see answer by venugopalramana(3286)

Question 64924: Find two prime numbers that, if multiplied, would generate a 400-digit number.
Click here to see answer by stanbon(75887)

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