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

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

Question 1085322: Fill in the smallest digit to make the number divisible by 4.
1. 15_4 , 21_4 , 32_2
2.1_44 , 163_ , 33_2
Click here to see answer by AnlytcPhil(1806)

Question 1085541: 60a^2b divided by 36
Click here to see answer by ikleyn(52752)

Question 1085517: what is the divisibility of 5__1=3 ?
Click here to see answer by ikleyn(52752)

Question 1085544: 224a^3b4c^2 divided by 16ab4c2
Click here to see answer by Fombitz(32388)

Question 1086434: A test has 20 questions worth 100 points. The test consists of True/False questions worth 3 points each and multiple choice questions worth 11 points each. How many multiple-choice questions are on the test?
Your answer

Click here to see answer by Boreal(15235)

Question 1086860: I am thinking of a two-digit prime number. It is less than 40. The sum of its digits is 10. What number is it?
Click here to see answer by Alan3354(69443)

Question 1086860: I am thinking of a two-digit prime number. It is less than 40. The sum of its digits is 10. What number is it?
Click here to see answer by TheBen(2)

Question 1088371: Find the points of intersection of the parabola y = −2 (x + 1)^2 − 5, where y = f(x), x ∈ R, and the straight line y = mx − 7, where y = f(x), x ∈ R.
Click here to see answer by Fombitz(32388)

Question 1089774: I understand that reciprocal times the original fraction is equal to 1
But i do not understand how that relates to a fraction divided by a fraction.
Example:
5/3 / 1/2
is the same as
5/3 * 2/1
I have been thinking about this for days and I have immense trouble comprehending it. I just don't understand the logic.
Click here to see answer by Alan3354(69443)

Question 1089795: Remainder when n is devided by 5 is 3 find remainder when 12n+4 devided by 5
Click here to see answer by ikleyn(52752)

Question 1090247: When 1000 is divided by some positive integer x, the remainder is 45. What is the sum of the largest and smallest value of x
Click here to see answer by ikleyn(52752)

Question 1091348: From left to right, the first three digits of a 4-digit number add up to 6. Which digit could be in the ones place if the 4-digit number is divisible by 6?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1091803: What is the difference between the greatest prime number that is less than 60 and the least prime number?

Click here to see answer by Edwin McCravy(20054)

Question 1092856: What is The greatest prime you must consider to test whether 8868 is prime?
Click here to see answer by ikleyn(52752)

Question 1092999: Solve 40x is congruent to 777 (mod 1777).
Click here to see answer by ikleyn(52752)

Question 1093280: Find the least residue of 5^8 (mod 7).
Show your steps.
Click here to see answer by rothauserc(4718)

Question 1093280: Find the least residue of 5^8 (mod 7).
Show your steps.
Click here to see answer by ikleyn(52752)

Question 1095833: Paul bought 12.8 pounds of apples at the farmer�s market.
Each pound of apples cost $1.65. How much did the apples cost?
Click here to see answer by Alan3354(69443)

Question 1096025: Need help with finding an equation that shows 84 as a product of prime factors and then use equation to help you find 84�12 and 84�21 what
Click here to see answer by Alan3354(69443)

Question 1097370: What is the 1275th term of the sequence 1,3,5,...,15,1,3,5,...,15,1,...
Click here to see answer by ikleyn(52752)

Question 1097803: In the primes between 100 and 200 there are instances when three consecutive primes have an average equal to the middle number. How many times does this occur?
Click here to see answer by MathTherapy(10549)

Question 1097998: Mrs. Jones has 18 boys and 27 girls in choirs. She wants them in equal rows. Only boys or girls will be in row(meaning no mixed rows). What is the greatest number of students that can stand in each row?
Click here to see answer by Edwin McCravy(20054)

Question 1098659: let n be the largest integer less than 10000 that leaves remainder 1 when divided 2,3,4,5,6,7 and 8.the sum of the digits of n is
Click here to see answer by Edwin McCravy(20054)

Question 1098617: A six-digit number is formed by repeating a three-digit number as in 639639. Find the sum of the prime factors all such numbers have in common.
Click here to see answer by ikleyn(52752)

Question 1098698: whats 540 divided by 5 solved in written form

Click here to see answer by Alan3354(69443)

Question 1099200: What is the greatest multiple of 37 that has exactly 4 digits
Click here to see answer by ikleyn(52752)

Question 1099200: What is the greatest multiple of 37 that has exactly 4 digits
Click here to see answer by greenestamps(13195)

Question 1099217: FOR A TREE PLANTATION,IT WAS DECIDED TO DIVIDE THE SAPLING IN TO EQUAL GROUPS OF 24 OR 30 OR 32 SUCH THAT NO SAPLING ARE LEFT.WHAT IS THE MINIMUM NUMBER OF SAPLINGS WHICH MAKES THIS POSSIBLE?
HOW MANY GROUPS CAN BE MADE,IF EACH GROUP HAS 24 SAPLINGS?
Click here to see answer by ikleyn(52752)

Question 1099922: (1)-if 41x is a multiple of 11,where x is a digit what is the value of x
(2)-if 3y5 is a multiple of 11,where y is a digit what is the value of y
(3)-if 41z2 is a multiple of 6,where z is a digit what is the value of z
Click here to see answer by greenestamps(13195)

Question 1100247: When 64329 is divided by the number x, the successive remainders are 175,114 and 213. The sum of digit of x is?

Click here to see answer by KMST(5328)

Question 1100837: The quotient is 712, the remainder is 36 and the divisor is 9 more than the sum of both. What is the dividend
Click here to see answer by ikleyn(52752)

Question 1101855: Find all primes that divide 20!

Click here to see answer by math_helper(2461)

Question 1101855: Find all primes that divide 20!

Click here to see answer by greenestamps(13195)

Question 1102215: In a division sum the dividend is 96435 and the quotient is 150 find the divisor?
Click here to see answer by josgarithmetic(39613)

Question 1102212: In a division sum the dividend is 5045 and the divisor is 45 find the quotient?
Click here to see answer by Theo(13342)

Question 1102800: The product of how many consequtive intgers must be divisible by 5040?
Click here to see answer by greenestamps(13195)

Question 1103152: I am a proper fraction.My denominator is the largest 1 digit is the prime number.My numerator is the smaller factor of my denominator.What fraction am I?
Click here to see answer by jim_thompson5910(35256)

Question 1103370: the multiples of 12 and of 21 are written in order. What is the smallest positive difference between a multiple of 12 and a multiple of 21?
Click here to see answer by Alan3354(69443)

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