Tutors Answer Your Questions about Divisibility and Prime Numbers (FREE)
Question 67970: I basicly need help with everything... I can't afford a tutor... I am getting soo tired of going over the same things and not remembering how to do them... like product of prime and all that stuff... can you help?? I am doing Pre algebra, in the blue saxon book...
Thanks....
Click here to see answer by tutorcecilia(2152)   |
Question 78172: I am having trouble with a question from my school text book and I have asked my teacher but I am still confused. The question is list two numbers with a HCF of 12 and a LCM of 180. I have asked my mum and and she doesn't get it. She checked in the awnsers fo me but that didn't help either. So can you please show me step by step workings to solve this problem. Thank you.
Click here to see answer by checkley75(3666) |
Question 78172: I am having trouble with a question from my school text book and I have asked my teacher but I am still confused. The question is list two numbers with a HCF of 12 and a LCM of 180. I have asked my mum and and she doesn't get it. She checked in the awnsers fo me but that didn't help either. So can you please show me step by step workings to solve this problem. Thank you.
Click here to see answer by jim_thompson5910(28595) |
Question 80802: The following nine digit number has its units digit ereased: 25478016__.
test for divisiblity are required.
if the # is divisible by 3 list all possible units digits for the number.
if the # is divisible by 9 list all possible units digits for the number.
if the # is divisible by 8 list all possible units digits for the number.
if the # is divisible by 12 list all possible units digits for the number.
Click here to see answer by stanbon(57348) |
Question 80802: The following nine digit number has its units digit ereased: 25478016__.
test for divisiblity are required.
if the # is divisible by 3 list all possible units digits for the number.
if the # is divisible by 9 list all possible units digits for the number.
if the # is divisible by 8 list all possible units digits for the number.
if the # is divisible by 12 list all possible units digits for the number.
Click here to see answer by Edwin McCravy(8909)  |
Question 84158: The Prime numbers between successive gaps of ten numbers are:
2, 3, 5, and 7.
11, 13, 17, and 19.
23 and 29.
31 and 37.
41, 43, 47, and (not 49 - square of 7)
53 and 59.
61 and 67.
71, 73, and 79 and (not 77)
83 and 89.
91 and 97.
Can you see a pattern forming? Despite of this I was not able to formulate a simple and general expression so that I could tell whether or not a number is prime by simply looking at the number and applying the above sequence. Can you help? Please! I am very excited about this project. It is my own thought and has not been assigned to me as a homework.
Thankyou.
Click here to see answer by rapaljer(4667)  |
Question 86742: I need help with the following problem.
Someone spilled ink on a bill for 36 sweatshirts. If only the first and last digits were covered and the other three digits were, in order, 8, 3, 9 as in
?83.9?, how much did each cost?
I do not have a clue how to do this problem. Please help.
Thank you for your time, it is appreciated.
Sincerely,
R. Franke
Click here to see answer by Edwin McCravy(8909) |
Question 86742: I need help with the following problem.
Someone spilled ink on a bill for 36 sweatshirts. If only the first and last digits were covered and the other three digits were, in order, 8, 3, 9 as in
?83.9?, how much did each cost?
I do not have a clue how to do this problem. Please help.
Thank you for your time, it is appreciated.
Sincerely,
R. Franke
Click here to see answer by ankor@dixie-net.com(15652)  |
Question 86869: I need help with this problem. The problem states:
Two digits of this number were erased: 273*49*5. However we know that 9 and 11 divide the number. What is it?
What I have done so far:
2+7+3+*+4+9+*+5 = 30+*+*
The only number divisible by both 9 and 11 is 99. However, to make the sum of this number equal 99 the two missing digits would have to be 35 and 34. Would these numbers be correct? I have tried other single digit numbers and haven't found a sum divided by both 9 and 11.
Your help would be appreciated. Thanks.
Sincerely
R. Franke
Click here to see answer by ankor@dixie-net.com(15652) |
Question 86740: I need help with this problem. The problem states:
Two digits of this number were erased: 273*49*5. However we know that 9 and 11 divide the number. What is it?
What I have done so far:
2+7+3+*+4+9+*+5 = 30+*+*
The only number divisible by both 9 and 11 is 99. However, to make the sum of this number equal 99 the two digits would have to be 35 and 34. I am not sure if these numbers qualify? I tried other single numbers and haven't found a sum divided by both 9 and 11.
Your help would be most appreciated. Thanks.
Sincerely,
R. Franke
Click here to see answer by scott8148(6628)  |
Question 88232: Hi there,
I have to express my answer in simplest form after adding this problem. The problem reads like this: 6/3x-2 + 3/2x.
I'm not even really sure what to do, so any help you can give me would be greatly appreciated!
Thank you so much!!
Click here to see answer by longjonsilver(2297)  |
|
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
|
