Topic: six list of topics
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21 items are filed under this topic.

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	A six digit number containing no zeros		2010-11-15
		From John: Find a Six digit number containing no zeros in which the first digit is three less than the third, the third digit is three less than the fifth,and the second digit equals the sum of the last three digits. Answered by Penny Nom.
	Six nines		2010-09-16
		From Steph: It's sort of one question. We have to use six nines to get the numbers 1-30. I got all but 22, 23, 24, and 30. Like 15 is 9+9-(9+9+9)/9. Answered by Penny Nom.
	Six-letter words		2009-11-24
		From christine: How many six-letter words (not necessarily an English words) are there in which exactly three of the letters are z's? Answered by Claude Tardif.
	Adding in base six		2009-03-29
		From Lucy: If you are working in base 6, what do you have to add to 4(base 6) to get 10(base 6)???? Answered by Penny Nom.
	A six sided lot		2008-06-25
		From Zack: Please help me find the area of my lot. I am sending a fax of the drawing and dimensions. Zack Answered by Harley Weston.
	A sixfold increase		2007-10-24
		From Fred: If I have $500 and it grew to $3,000, what is the correct description of the increase? Is it a sixfold increase (sextupled), or a fivefold increase (quintupled)? When I divide $3,000 by $500, the result is six, therefore, a sixfold increase? Answered by Stephen La Rocque.
	I have a 6 digits		2007-09-28
		From Kim: I have a 6 digits. My hundred-thousands digit is 1 less that my ones digit, 8 more than my thousands digit, twice my tens digit, and 4 times my hundreds digit. My ten-thousands digit is 0. What number am I? Answered by Stephen La Rocque.
	More on the sixth degree equation		2007-08-21
		From Farzan: Equation 1 : (R + (6.67*5.98*10^13/((R^2)*2)))^2 - (R^2) = (7.27*(10^-5)*R)^2 Equation 2 : (6.67*5.98*10^13/(R^2*2))^2 + 6.67*5.98*10^13/R = (7.27*10^-5*R)^2 As you see if we expand the left part of the first equation and simplify, the equations become same, but these two equations have different answers in my math software.The first one has 3 amounts for R, but the second one has 6 amounts. Why are the answers different ? Answered by Stephen La Rocque.
	A sixth degree equation		2007-08-20
		From Farzan: Dear friends I need to solve this equation with an understandable method for high-school students : (6.67*5.98*10^13/(R^2*2))^2 + 6.67*5.98*10^13/R = (7.27*10^-5*R)^2 please solve this problem if you have time. Answered by Harley Weston.
	The probability of rolling double sixes twice in a row		2007-07-10
		From Matt: what is the probability of rolling double sixes twice in a row? Answered by Stephen La Rocque.
	6- team schedule for softball		2007-03-29
		From Angie: I have 6-teams that can only play 3 days a week. Each team must get 18 games in for the season. I have to split them being the home team and the away team sometimes. Answered by Penny Nom.
	Six digit numbers with at least one 7		2004-12-27
		From Behzad: How many six-digit numbers contain at least one 7 in their decimal expansion? Answered by Penny Nom.
	Three consecutive positive intergers		2003-02-09
		From Yew: Prove that when we multiply any consecutive positive intergers, the result is always divisible by 6. ex. (7)(8)(9) = 504 = 6 (84) Answered by Penny Nom.
	6 digit numbers from 0,0,2,2,4,4		2003-01-23
		From Amanda: How many 6 digit numbers can you make from the numbers 0,0,2,2,4,4, giving that 0 cannot come first. The number has to contain 2 twos, 2 fours, and 2 zeros. Answered by Penny Nom and Claude Tardif.
	How do you get to 100 by using 6 nines?		2001-11-17
		From A student: How do you get to 100 by using 6 nines? Answered by Claude Tardif.
	Six nines		2001-10-09
		From A mom: My middle schooler (sixth) has to calculate the integers 0-20 using only 6 nines. We have done all but the integer 14. He can not use decimals or double the nine like 99 or 19. the fraction 9/9 is okay. Keep in mind of course the order of operations. Answered by Claude Tardif.
	Six typists		2000-08-19
		From Paula Duncan: If it takes a typist 4.5 hours to type 860 words, how many hours would it take 6 typist to do 16800 words? Answered by Penny Nom.
	Six letter words		2000-05-15
		From Karl Freitag: An anthroplogist discovers an isolated tribe whose written alphabet contains only six letters (call the letters A,B,C,D,E, and F). The tribe has a taboo against using the same letter twice in the same word. It is never done. If each different sequence of letters constitutes a different word in the language, what is the maximum number of six-letter words that the language can employ? Answered by Penny Nom.
	Six digit numbers using 1,2,5,6,7, and 9		2000-03-20
		From Rachel: How many different six-digit numbers can you make using the digits 1,2,5,6,7, and 9? How many of these six digit numbers are divisible by six? Answered by Claude Tardif and Denis Hanson.
	Factoring ^6		2000-01-03
		From Athena: my name is Athena and I have a question on factoring: how would you figure this out: (x6-y6) and (x6+y6) Answered by Penny Nom.
	A Six Digit Number		1998-10-27
		From Craig Bedard: If a certain six-digit number is split into two parts, one constituting the first three digits and the other the last three digits, and the two parts are added and the resultiong sum squared, it is found that the product is the original six digit number. What is the original six-digit number? At first it seemed liked an impossible question, until it hit me...how long will it take you? Answered by Jason Stein and Dan Usselman.

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