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Algebra: Divisibility and Prime Numbers

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Question 188370: Kindly provide your help.
what will be the next number? how is this calculated & what formula it was derived?
1, 2, 6, 42, 1806, __ ?
Appreciate your feedback. Thanks!
Regards,
JML
Click here to see answer by solver91311(5072)

Question 188692: I am having a difficult time with finding the formula for additive counting and finding the answer the following problem. Could someone please show me using the correct formula how to solve this problem. The question is: How many counting numbers less than 46 are divisible by 3 or 5.
Thanks in advance for your help.
Click here to see answer by stanbon(26259)

Question 191699: use nsquared+n+17 to generate prime numbers when n=6
Click here to see answer by solver91311(5072)

Question 192950: If 31z5 is a multiple of 9, where z is a digit, what is the value of z?
Click here to see answer by jim_thompson5910(13787)

Question 193640: Please Help I am stumped !
15/32=x/x-7
Click here to see answer by Alan3354(6059)

Question 197409: find greatest number of 4-digit which is divide by 15,28 &20.
Thank you
Click here to see answer by edjones(3292)

Question 197802: Round the quotient to the nearest hundredth: 6 ÷ 9
,Thank You
Click here to see answer by mycat08(3)

Question 197806: Round the quotient to the nearest hundredth: 6.01 ÷ 35 =
Click here to see answer by mycat08(3)

Question 197834: Round the quotient to the nearest hundredth: 81.6 ÷ 29
Click here to see answer by Mathtut(3670)

Question 197805: Round the quotient to the nearest hundredth: 9.061 ÷ 7
Click here to see answer by Mathtut(3670)

Question 197804: Round the quotient to the nearest hundredth: 17.44 ÷ 3

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Question 197803: Round the quotient to the nearest hundredth: 11 ÷ 6

Click here to see answer by Mathtut(3670)

Question 198102: 2 to the power of 10 minus 4 is divisible by
a)31 b)11 c)9 d) 7 e) 5
Click here to see answer by vleith(1977)

Question 198428: We know that for a number to be divisible by 3, we have to add up the individual digits and check if it is divisible by 3, for example, 21 is divisible by 3 as the digits 2+1=3 is divisible by 3. Without the calculator, are there ways to check divisibility by 2, 4, 5, 6, 7, 8, 9?
Click here to see answer by jim_thompson5910(13787)

Question 198487: use prime factors to find the GCF of 32 and 28
32=
28=
GCF=
Click here to see answer by checkley77(7035)

Question 198539: How many positive integers not greater than 600 are multiples of 2 but not 3?
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Question 198998: If n is an integer and 4 is the remainder when 4n - 1 is divided by 5, then n could be
Click here to see answer by RAY100(1637)

Question 199000: If p is the greatest prime factor of 34 and q is the greatest prime factor of 90, what is the greatest prime factor of the product pq ?
Click here to see answer by Edwin McCravy(2920)

Question 199502: Find the least common multiples of 18,27,and 45

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Question 199516: A) find the mode of the following set of numbers
B) Find the range of the following set of numbers
11,13,13,12,11,12,13,10,14
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Question 199515: the following scores were recorded on a 100-point examination
95,75,76,86,96,71,68,81,95,76,69,82,93,88,94
find the mean and median final examination scores?
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Question 200517: 15 plus 4 to the third divided by 8 minus 4 equals what? I seem to get a different answer every time
Click here to see answer by Alan3354(6059)

Question 200753: what is the smallest divisor of ( 3 to the power of eleven plus 7 to the power of twenty five ) ?
Click here to see answer by rfer(2688)

Question 193448: What is the prime factor of 25n by the power of 2
Click here to see answer by Earlsdon(4898)

Question 200927: How many whole numbers between 1 to 200 are divisible by 6 and not by 10 ?
Click here to see answer by rfer(2688)

Question 200927: How many whole numbers between 1 to 200 are divisible by 6 and not by 10 ?
Click here to see answer by jim_thompson5910(13787)

Question 201146This question is from textbook
: I do not understand how to factor a composite number into a product of prime numbers. For example: 120This question is from textbook

Click here to see answer by RAY100(1637)

Question 201346: How many positive primes have a remainder of zero when divided by 13?
Click here to see answer by Alan3354(6059)

Question 201346: How many positive primes have a remainder of zero when divided by 13?
Click here to see answer by stanbon(26259)

Question 201501: tom has 7 sandwiches,jan has 5, simon has none. they share them out equally.simon leaves, paying for his sandwiches by leaving 12 biscuits. whats the fairest way for Tom and jan to share out the biscuits?
Click here to see answer by rfer(2688)

Question 201841: if a = 4b + 26 and b is a positive integer. the a could be divisible by all of the following except
a)2 b) 4 c) 5 d)6 e) 7
Click here to see answer by Theo(667)

Question 201841: if a = 4b + 26 and b is a positive integer. the a could be divisible by all of the following except
a)2 b) 4 c) 5 d)6 e) 7
Click here to see answer by jim_thompson5910(13787)

Question 201989: What is the smallest composite number over 10,000 whose digits sum to the same value as the sum of the digits of its prime factorization?

Click here to see answer by Alan3354(6059)

Question 202123: What is the step to solve x-2/x+3<2 ?
Click here to see answer by rfer(2688)

Question 203556: How many positive factors of 72 are perfect cubes?
Click here to see answer by promotion analysis(5)

Question 203666: -16,061 is this divisable of 2, 3,5,6, 9 , 10, or none
Click here to see answer by Alan3354(6059)

Question 204251: I have been trying to answer this question all morning long. I skipped ahead and answered my other ones and just kept coming back to this one. Will you please help me? What is the GCF of 69 and 93?
Click here to see answer by rfer(2688)

Question 204975: Find the prime factorization and match your result to the correct answer below.
180
a. 22•32•5
b...2•3•5
c...22•32•75
d....4•5•9
Click here to see answer by RAY100(1637)

Question 205237: How many integers between 1 and 10 are multiples of either 3 or 5 but not multiples of both?
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Question 205237: How many integers between 1 and 10 are multiples of either 3 or 5 but not multiples of both?
Click here to see answer by MathTherapy(336)

Question 205958: The product of two numbers is 600. Their LCM is 60. Find the HCF
Click here to see answer by RAY100(1637)

Question 206084: Could you please help me understand how I would check for divisibility by 45.
I thought you would first check for divisibility of 5 in the number and then I thought if you added the numbers together and they combined to give you a total of 9 then the number would be divisible by 45 but this worked for a lot of numbers I tried but then I tried 31120110 and it is not divisible by 45 so that puts my theory out.
Could you explain how I would check for divisibility of 45.
Many thanks
Click here to see answer by jim_thompson5910(13787)

Question 206157: is 26 a prime number and how do you do the equation

Click here to see answer by checkley77(7035)

Question 206379This question is from textbook Mcdougal Littel
: What 2 composite numbers whose prime factors each have a sum of 18?
This question is from textbook Mcdougal Littel

Click here to see answer by stanbon(26259)

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