







Une autre bille de rayon différent 
20020227 

Sarah pose la question : une bille de 6 cm repose au fond d'1 cylindre droit dont la base est un disque de rayon 10 cm. On verse de l'eau dans le cylindre de façon à recouvrir exactement la bille. Démontrez que l'on peut remplacer la bille par une autre bille de rayon différent (mais supérieur) de sorte que l'eau initialement versée recouvre exactement cette nouvelle bille Claude Tardif lui répond. 





More on millions and billions 
20100311 

julio pose la question : shouldn't the thousands of millions, tens of thousands of millions, and hundreds of thousands of millions be called what they are? technically they are not billions because billions come after 999,999,999,999 . It would sound better to call the numbers by their real name when economists talk about the national deficit besides mathematics is a very precise science that doesn't admit mistakes. Or am I wrong? I know that in other countries is expressed different than here. I have this question to different people and nobody has a "logical" explanation to it. " that's the way is here in the US" does not explain any thing Penny Nom lui répond. 





Billions and more! and even more! 
20040301 

Steph pose la question : What comes after undecillion? Penny Nom lui répond. 





Billions and more! 
19970915 

Mahabir B. Gupta pose la question : I would like to know how you americans write the number 1 billion. Do you say "One thousand million"..can you answer by giving me examples? 1,000,000> 1 million 1,000,000,000>1 billion Why is it that in spanish it is different? Penny Nom lui répond. 





2.5 percent of 1.5 billion 
20210513 

Anish pose la question : What is the 2.5 percent of 1.5 billion?
please state if there are any general formulae of this calculation.
Thank you Penny Nom lui répond. 





400 in 7.5 billion 
20190828 

Emma pose la question : What is a better way to express 400 in 7.5 billion?
My daughter has a rare condition, I want to know the answer to say “she is 1 in a ...” Penny Nom lui répond. 





Percentages 
20190330 

Mari pose la question : I am trying to find out what percentage of our worlds population does the youtuber
Pewdiepie have for subscribers? So he has 91 million subscribers and there are roughly
7.53 Billion people in the world. So what percent of our worlds population does Pewdiepie
have for subscribers? Am I asking this correctly? I am just curious for marketing reasons
and how much of the worlds market share does Pewdiepie have for his youtube
channel? I just do not know how to set up the problem to find the answer? Penny Nom lui répond. 





0.025% of 575 billion 
20181128 

JoAnne pose la question : What is .025% of 575 billion dollars? Penny Nom lui répond. 





Billions and trillions 
20180225 

Sheila pose la question : How many 50 billion equal 100 Trillion ?
How many 20 billion equal 100 Trillion?
How many 500 million equal 100 Trillion?
How many 50 million equal 100 Trillion?
How many 50 thousand equal 100 Trillion? Penny Nom lui répond. 





1 billion x 1 billion 
20170811 

Kona pose la question : 1 billion x 1 billion
1 trillion x 1 trillion Penny Nom lui répond. 





20 million as a percentage of 7.3 billion 
20151118 

Nick pose la question : Based on the estimate of the worlds current population (7.3 billion people), I'm trying to work out what percentage of that figure 20 million people would amount to?
(Apologies in advance that I've no idea if the 7.3 billion figure is an American Billion or UK billion)
Thanks for any help.
Nick. Penny Nom lui répond. 





What is 1000 billion billion? 
20150310 

LeRoy pose la question : what does this mean? 1000 billion billion Penny Nom lui répond. 





$xx,xxx million 
20150112 

sherry pose la question :
as a financial editor, for years I've seen $\$$ amts like this:
$\$xx,xxx$ million (ie, with a comma, not dec point)
Isn't that thousands of millions, which would equal 'billions'? Penny Nom lui répond. 





25 billion dollars 
20110826 

Bill pose la question : If you have $25billion dollars, what would the value of this amount become if you inflated it at 4% per year for 55 years?=C2=A0 My TVM calculator will not go this high. Penny Nom lui répond. 





Multiplying Large Numbers 
20090709 

Jessica pose la question : What is 12 billion X 6 trillion? Janice Cotcher lui répond. 





Multiplying Large Numbers 
20090709 

Jessica pose la question : What is 12 billion X 6 trillion? Janice Cotcher lui répond. 





What is 3 trillion divided by 3 billion? 
20090618 

Dianna pose la question : What is 3 trillion divided by 3 billion? Penny Nom lui répond. 





Why is the difference between british and american counting? 
20081215 

Muhammad pose la question : Why is the difference between british and american counting?
Example 1 Billion american = 1,000,000,000 but,
1 Billion British = 1,000,000,000,000 Robert Dawson and Harley Weston lui répond. 





The prime factorization of one billion 
20081102 

Alta pose la question : The prime factorization of 1000 is 2 cubed times 5 cubed. How do you write the prime factorization of one billion using exponents? Penny Nom lui répond. 





Some number words 
20080925 

jodie pose la question : My son would like to know the names of digits. When counting it starts ones, tens, hundred, thousand, millions, billions, trillion...he would like to know the order of what comes next and how far we have named them.. Penny Nom lui répond. 





How much can Daisy spend? 
20071014 

Math pose la question : Daisy has $25.00 to spend on dinner. Her sister tells her to leave 18% of the bill as a tip and
the sales tax is 8% of the bill. What is the maximum amount she can spend on dinner in order to cover
the meal, sales tax, and the tip? Penny Nom lui répond. 





Water bill woes 
20070812 

Terry pose la question : I know that a cubic foot of water=7.48051945 gals., but I keep getting my water bill and they go by thousands of a gal. per cubic foot. Is there a conversion that says that shows this? Water department=.763 x cubic foot used=thousands of gallons water used that month. Exampel: 72cu. ft meter reading x .763+ 58. galons of water I use in a month. Total 58=thousand = +gallons. This is wrong. There are only two people in the house. Stephen La Rocque lui répond. 





$380 Billion divided by 29.6 million 
20070205 

Bob pose la question : $380 Billion divided by Iraq population of 29.6 million equals $_____ / Iraqi. Penny Nom lui répond. 





1.26 billion 
20061210 

James pose la question : how do you write 1.26 billion Penny Nom lui répond. 





10,000 Million sandwiches 
20060912 

A business person pose la question : One of our customers said that the UK sells "10,000 Million" sandwiches annually in their take away restaurants...
How many is this exactly? Stephen La Rocque lui répond. 





How many billions make a trillion? 
20060408 

Bill pose la question : How many billions make a trillion? Penny Nom lui répond. 





A bill with a 15% tip and a 10% discount 
20060320 

Tracy pose la question : A $4500 bill is presented, without tax. 10% discount coupon. Add 15% tip with 3 people spitting for the sever. Penny Nom lui répond. 





Daddy Warbucks' cash 
20060222 

Grace pose la question : Daddy Warbucks always carries a specific number of $100 and $500 bills for impulse purchases and $1 bills for tips. If he has 500 bills in his briefcase and they total $50,000, how many bills of each denomination does he carry? Stephen La Rocque lui répond. 





6 trillion x 50 million 
20050930 

Roly pose la question : There is a realm of the richest galaxies in the in the night sky. They are 50 million light years away. That is 6 trillion x 50 million???. What math equivalent is that? Penny lui répond. 





One million times one billion 
20050215 

A student pose la question : How much is ONE MILLION TIMES ONE BILLION in the American system ? Penny Nom lui répond. 





A big number 
20040826 

Mark pose la question : If you have $999,999,999,999,999,999,999,999,999,999.99 and you find a pennie how much is that and can you give me the name of it. Penny Nom lui répond. 





A big number 
20040808 

Carter pose la question : Can you tell me what number this is?
10,000,000,000,000,000,000,000,000,000,000,000,000
Where can I find the names for big numbers? Penny Nom lui répond. 





Billions in Australia 
20040312 

An Australian pose la question : how many million in one billion ? Penny Nom lui répond. 





How high does the sequence of numbers go 
20030907 

Shayna pose la question : My quetion is "How high to the sequence of numbers go"? e.g. one, ten, hundred, thousand, million, billion, trillion, and from there is my queston. Penny Nom lui répond. 





One percent of a billion 
20030904 

Charles pose la question : What is one percent of one billion? Penny Nom lui répond. 





Hundreds, thousands, millions,... 
20030219 

Karissa and Jasmeen pose la question : hundreds, thousands, millions,  can you help us with the rest of this sequence  we are trying to find the largest number Penny Nom lui répond. 





Arithmitic sequence 
20030201 

A student pose la question : I am having problems solving this arithmetic sequence... 1, 5, 10, ___, 50, 1.00, ___, 10.00, ... I believe the answers to be 25 and 5.00 but I can't figure why. Claude Tardif lui répond. 





How many billions equal one trillion? 
20021207 

Ryan and Aylah pose la question : How many billions equal one trillion? We believe that the answer is one thousand times one billion equals one trillion. Please help us with the answer to this question. Penny Nom lui répond. 





6,000,000,000,000,000,000 
20010712 

James pose la question : How would I express 6,000,000,000,000,000,000 in words? Leeanne Boehm lui répond. 





A phone bill 
20010618 

Janet pose la question : What is the formuala to calculate cost per minute? Here is the data below # of calls  238 # of minutes  443 cost  $70.06 Penny Nom lui répond. 





How big is a trillion? 
20001107 

A teacher pose la question : How can you explain how much a trillion is to a 5th grade class? Penny Nom lui répond. 





Names for large numbers 
20000616 

Mireille Carthier pose la question : I am trying to find the common names (in English and French) for the big numbers as follows:  English  French  10^{6}  million  million  10^{9}  billion  milliard?  10^{12}  trillion  billion?  10^{15}  ??  trillion?  Thank you very much Claude Tardif and Harley Weston lui répond. 





An unbelievable story 
20000117 

Melissa pose la question : good morningi am taking a course "math for elementary teachers" and i have a take home problem that i really need help on. here is the question the million dollar problem a recent item in the newspaper described a robbery in which the robber had held up a local bank for 1 million dollars in small bills, had the tellers put the money in a briefcase which he gave them, and fled the scene on foot. is this story believable? explain your answer! Harley Weston lui répond. 





Dollar Bills 
19990927 

NRQT pose la question : Why are 1999 American dollar bills worth more than 1997 American dollars bills? This has to be put into a mathematical problem??? Penny Nom and Claude Tardif lui répond. 





A gazillion 
19990821 

Leah pose la question : Does a gazillion really exist? Penny Nom lui répond. 





Thousands, millions, billions and trillions 
19960822 

Blaine pose la question : What are the names of the periods in groups of numbers like 123,456,789. I need to know the names of them for school. I already know the first ones: units thousands millions billions trillions. Penny Nom and Diane Hanson lui répond. 

