jimmyrep
 Name:
 James Foster
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 About:
 retired old guy
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Questions Asked

jimmyrep:
Group Title
Something weird is happening to me on Openstudy in last couple of days. When i logout my icon stays on the home screen.
 updated 2 years ago
 5 replies
 No Medals Yet
Mathematics

jimmyrep:
Group Title
Whats the best way of physically cleaning inside my desktop tower, which is very dusty?
 updated 2 years ago
 9 replies
 7 Medals
Mathematics

jimmyrep:
Group Title
Just for fun: How do you get the answer 24 by only using the numbers 8,8,3,3 and the arithmetic operators?
 updated 2 years ago
 16 replies
 4 Medals
Mathematics

jimmyrep:
Group Title
If I place 1 coin on the bottom lefthand square of a chess board and then 2 on second ,4 on the third and keep doubling the number of coins…
 updated 2 years ago
 10 replies
 4 Medals
Mathematics

jimmyrep:
Group Title
Differentiate sin(sin(sin(sin(sinx
 updated 2 years ago
 15 replies
 10 Medals
Mathematics

jimmyrep:
Group Title
The brilliant Indian mathematician Ramanujan immediately answered a a question from the English mathematician Hardy. Hardy mentioned the num…
 updated one year ago
 27 replies
 4 Medals
Mathematics

jimmyrep:
Group Title
Just out of interest  i found a surprising result in complex number theory  evaluate i^i using the identity cos x + i sin x = e^ix where…
 updated 2 years ago
 21 replies
 4 Medals
Mathematics

jimmyrep:
Group Title
Here's a bit of useless knowledge for you  who invented the equals sign and where was he born?
 updated 2 years ago
 35 replies
 7 Medals
Mathematics

jimmyrep:
Group Title
Anybody know of a website where i could learn something about programming in C or C++?
 updated 2 years ago
 8 replies
 1 Medal
Mathematics

jimmyrep:
Group Title
Can someone have a look at the attached problem . I get the answer 112pi/15 but the document states its 64pi/15, and I can't see where I've…
 updated 3 years ago
 18 replies
 2 Medals
Mathematics

jimmyrep:
Group Title
Can someone have a look at the attached problem . I get the answer 112pi/15 but the document states its 64pi/15, and I can't see where I've…
 updated 3 years ago
 15 replies
 No Medals Yet
Mathematics

jimmyrep:
Group Title
what is the sum of the external angles of a polygon?
 updated 3 years ago
 6 replies
 1 Medal
Mathematics

jimmyrep:
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I mean to change my desktop soon and want to completely erase my hard disk. Can anyone suggest some good software packages to do this?
 updated 3 years ago
 6 replies
 3 Medals
Mathematics

jimmyrep:
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Here is a tricky math puzzle. I only managed to solve it after being given the clue.
Find the next number in the sequence
…
 updated 3 years ago
 6 replies
 2 Medals
Mathematics

jimmyrep:
Group Title
Prove that if you keep adding the digits of any number and get the answer 3,6 or 9 then the number is divisible by 3. I used to know this p…
 updated 2 years ago
 11 replies
 1 Medal
Mathematics

jimmyrep:
Group Title
Show mathematically why we take 0! to be = 1.
 updated one year ago
 4 replies
 1 Medal
Mathematics

jimmyrep:
Group Title
A rectangular sheet of paper is divided into two pieces by a single straight cut. One of the pieces is then further divided into two, also …
 updated 3 years ago
 5 replies
 1 Medal
Mathematics

jimmyrep:
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Paul takes a natural number n and adds together the distinct factors of n other than n itself. Which of these numbers can never be Paul's a…
 updated 3 years ago
 15 replies
 No Medals Yet
Mathematics

jimmyrep:
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Given any positive integer n, Paul adds together the distinct factors of n, other than n itself. Which of these numbers can never be Paul's…
 updated 3 years ago
 No Medals Yet
Mathematics

jimmyrep:
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there are five keys to five cars. what is the probability that someone picks up one of the keys and opens one of the cars?
 updated 3 years ago
 6 replies
 2 Medals
Mathematics

jimmyrep:
Group Title
calculate the number whose difference between itself and its square is a maximum
 updated 3 years ago
 10 replies
 1 Medal
Mathematics

jimmyrep:
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what is the next perfect number after 28? I did know but my memory is failing me.
 updated 3 years ago
 2 replies
 No Medals Yet
Mathematics

jimmyrep:
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if 5^p = 9 and 9^q = 16 and 16^r = 25 what is the value of pqr?
 updated 3 years ago
 1 reply
 1 Medal
Mathematics

jimmyrep:
Group Title
Simplify (ap)(bp)(cp).............(yp)(zp)
 updated 3 years ago
 2 replies
 1 Medal
Mathematics

jimmyrep:
Group Title
i am baffled about how to do the following problem
Sum to n terms the following series…
 updated 3 years ago
 51 replies
 No Medals Yet
Mathematics