Welcome Guest
You last visited January 20, 2017, 5:30 am
All times shown are
Eastern Time (GMT-5:00)

# Three short math questions.

Topic closed. 10 replies. Last post 4 years ago by RL-RANDOMLOGIC.

 Page 1 of 1
Zeta Reticuli Star System
United States
Member #30470
January 17, 2006
10391 Posts
Offline
 Posted: June 19, 2013, 12:55 am - IP Logged

From the book Investing The Last Liberal Art by Robert G. Hagstrom.

A bat and a ball cost \$1.10 The bat cost a dollar more than the ball.

How much does the ball cost?

Chances are excellent that your answer is wrong. Don't despair- over half the students at Harvard, MIT, and Princeton got it wrong, too. And they didn't do any better on the next two problems.

If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?

In a lake, there is a patch of lily pads. Every day the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long will it take for the patch to cover half the lake?

Those who run the lotteries love it when players look for consistency in something that's designed not to have any.

There is one and only one 'proven' system, and that is to book the action. No matter the game, let the players pick their own losers.

Kentucky
United States
Member #32652
February 14, 2006
7344 Posts
Offline
 Posted: June 19, 2013, 2:11 am - IP Logged

From the book Investing The Last Liberal Art by Robert G. Hagstrom.

A bat and a ball cost \$1.10 The bat cost a dollar more than the ball.

How much does the ball cost?

Chances are excellent that your answer is wrong. Don't despair- over half the students at Harvard, MIT, and Princeton got it wrong, too. And they didn't do any better on the next two problems.

If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?

In a lake, there is a patch of lily pads. Every day the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long will it take for the patch to cover half the lake?

Do I get a consolation prize for guessing five minutes for the second question and passing on the other two?

Florida
United States
Member #66575
October 30, 2008
3549 Posts
Offline
 Posted: June 19, 2013, 2:24 am - IP Logged

I had to think about it a minute but this is what I came up with

First one maybe  1.05  for the bat  and  .05  ( 5 cents ) for the ball //

Second one, I also see 5 minutes .

Third one - 47 Days

CG

mid-Ohio
United States
Member #9
March 24, 2001
19900 Posts
Offline
 Posted: June 19, 2013, 2:41 am - IP Logged

Do I get a consolation prize for guessing five minutes for the second question and passing on the other two?

If you want a prize use your math to figure out something useful like the next winning PB numbers.

* you don't need to buy more tickets, just buy a winning ticket *

Zeta Reticuli Star System
United States
Member #30470
January 17, 2006
10391 Posts
Offline
 Posted: June 19, 2013, 10:20 am - IP Logged

I had to think about it a minute but this is what I came up with

First one maybe  1.05  for the bat  and  .05  ( 5 cents ) for the ball //

Second one, I also see 5 minutes .

Third one - 47 Days

CG

Right on all three, CarliG.

Stack47,

Consolation prize,

Go with the orange colored balls in your state's Pick 5.

Those who run the lotteries love it when players look for consistency in something that's designed not to have any.

There is one and only one 'proven' system, and that is to book the action. No matter the game, let the players pick their own losers.

Krypton
United States
Member #140102
March 11, 2013
904 Posts
Offline
 Posted: June 19, 2013, 12:19 pm - IP Logged

From the book Investing The Last Liberal Art by Robert G. Hagstrom.

A bat and a ball cost \$1.10 The bat cost a dollar more than the ball.

How much does the ball cost?

Chances are excellent that your answer is wrong. Don't despair- over half the students at Harvard, MIT, and Princeton got it wrong, too. And they didn't do any better on the next two problems.

If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?

In a lake, there is a patch of lily pads. Every day the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long will it take for the patch to cover half the lake?

The bat costs \$1.05 and the ball costs .05. That way the bat does cost \$1 more than the ball.

3rd grade - Liberty Street School. Middletown , NY

Rocky Mount Sr High NC

NC State BSEE.

Lol

Dallas, Texas
United States
Member #4549
May 2, 2004
1834 Posts
Offline
 Posted: June 23, 2013, 5:03 pm - IP Logged

From the book Investing The Last Liberal Art by Robert G. Hagstrom.

A bat and a ball cost \$1.10 The bat cost a dollar more than the ball.

How much does the ball cost?

Chances are excellent that your answer is wrong. Don't despair- over half the students at Harvard, MIT, and Princeton got it wrong, too. And they didn't do any better on the next two problems.

If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?

In a lake, there is a patch of lily pads. Every day the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long will it take for the patch to cover half the lake?

Nice one CT! My 2 cents wouldn't be worth a dime at this point.

Congrats CarliG! You publicly beated down a few MITters!

My greatest accomplishment is teaching cats about Vienna Sausage. When I need a friend, all I need do is walk outside, pop open a can, and every little critter in the neighborhood drops by to say "Hi!"

Australia
Member #37136
April 11, 2006
3316 Posts
Offline
 Posted: June 23, 2013, 5:49 pm - IP Logged

its a long time since i did algebra,  ill give it a go

a=b+100

110 = (b+100)+b

so

110-100= bx2

10 = 2b

5=b

2014 = -1016; 2015= -1409; 2016  = -1171; 2017 = ?  TOT =  -3596

keno historic = -2291 ; 2015= -603; 2016= -424; 2017 = ? TOT = - 3318

Australia
Member #37136
April 11, 2006
3316 Posts
Offline
 Posted: June 23, 2013, 5:56 pm - IP Logged

it seems 1 machine would take 5 min to make 1 widget. so 10 machine  would be 5 min, and 100 machines would be 5 min. ther trick is a machine takes 5 min to make 1 widget

2014 = -1016; 2015= -1409; 2016  = -1171; 2017 = ?  TOT =  -3596

keno historic = -2291 ; 2015= -603; 2016= -424; 2017 = ? TOT = - 3318

Australia
Member #37136
April 11, 2006
3316 Posts
Offline
 Posted: June 23, 2013, 5:58 pm - IP Logged

yeah 1 day to double the size, so 48 days minus 1, woykld be  mean 1 day to go till its fullly covered.

2014 = -1016; 2015= -1409; 2016  = -1171; 2017 = ?  TOT =  -3596

keno historic = -2291 ; 2015= -603; 2016= -424; 2017 = ? TOT = - 3318

United States
Member #59354
March 13, 2008
4083 Posts
Offline
 Posted: June 26, 2013, 8:25 am - IP Logged

From the book Investing The Last Liberal Art by Robert G. Hagstrom.

A bat and a ball cost \$1.10 The bat cost a dollar more than the ball.

How much does the ball cost?

Chances are excellent that your answer is wrong. Don't despair- over half the students at Harvard, MIT, and Princeton got it wrong, too. And they didn't do any better on the next two problems.

If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?

In a lake, there is a patch of lily pads. Every day the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long will it take for the patch to cover half the lake?

CT

.05

5 minutes

the last day the patches double so 48-1=47

RL

Working on my Ph.D.  "University of hard Knocks"

I will consider the opinion that my winnings are a product of chance if you are willing to consider

they are not.  Many great discoveries come while searching for something else

Trump / 2016 & 2020

 Page 1 of 1