The Mathematics Thread

Re: The totally off-topic thread

The number of petals thing is nonsense, since that isn't a consistent rule. The "equations" are about adding a whole flower, not individual parts of the flower. The answer is not solvable, as all assumptions about the value of the 4 petal blue flower must be valid. Or perhaps 1+20x[4 petal blue flower].
 
Re: The totally off-topic thread

Agree with MedHead, the puzzle as shown is unsolvable. The answer should be 1+20x[4 petal blue flower] by precedence of mathematical operators, but as shown the image is nonsense, as are most of these silly primary school mathematics puzzles. Juts like the fellow who wrote the book on maths and puzzles and said tribes in deepest darkest South America never had a system of arithmetic that counted past 4. Bollocks.
 
Re: The totally off-topic thread

Favour please:

Future value of an investment after compound interest is described:

A=P(1+r/n)[SUP]nt[/SUP]

A= future value
P=principal
r=interest rate
n=number of periods interest is credited per year
t=number of years

I want to calculate the future value of that investment if I also make regular payments of the same amount at the beginning of the month compared with at the end of the month

Can anyone please assist with a mathematical formula
 
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Re: The totally off-topic thread

Quickstatus said:
Favour please:

Future value of an investment after compound interest is described:

A=P(1+r/n)[SUP]nt[/SUP]

A= future value
P=principal
r=interest rate
n=number of periods interest is credited per year
t=number of years

I want to calculate the future value of that investment if I also make regular payments of the same amount at the beginning of the month compared with at the end of the month

Can anyone please assist with a mathematical formula
Click to expand...

Try this

Future Value of Periodic Payments Calculator - High accuracy calculation
 
Re: The totally off-topic thread

Thanks.

....(1+r/n).....

Hate it when you know something missing but dont want to go back to first principles to work it out.
 
RooFlyer said:
Or, whatever crosses your mind.
Click to expand...
An engineer and a mathematician enter a room. This is the final stage of their respective examinations/tests in order to progress to the next stage in their careers.
The room is windowless and has a single door on the opposite side to where they entered.
About 30 seconds after entering, a gorgeous woman exits from this opposite door, holding a key. She says "this key is available for the taking, however I have one rule: you can only move towards me using jumps, each jump having a length of exactly half of the distance between you and me".
The mathematician sighs, lets out a big groan and crouches down, saying it's impossible to get the key.
The engineer lights up, and starts jumping. The mathematician says "hey, you'll be jumping forever and ever and never reach her!". The engineer, with a massive smirk on his face, looks back and says "I'll be close enough, for all practical purposes".
 
Alright, because the Mathematics thread is dead, a quick off-hand poll:

How many people here could and used to use a slide rule and/or mathematical lookup tables (book of tables)?

Of those of you who answered in the affirmative, do you think you could still use one or both today?
 
anat0l said:
Alright, because the Mathematics thread is dead, a quick off-hand poll:

How many people here could and used to use a slide rule and/or mathematical lookup tables (book of tables)?

Of those of you who answered in the affirmative, do you think you could still use one or both today?
Click to expand...

Yes

No
 
anat0l said:
Alright, because the Mathematics thread is dead, a quick off-hand poll:

How many people here could and used to use a slide rule and/or mathematical lookup tables (book of tables)?

Of those of you who answered in the affirmative, do you think you could still use one or both today?
Click to expand...
Yes
Yes
Yes
 
I learnt to use a slide rule but cannot remember how to use it now.

Re the mathematical look up tables. Are you referring to the books we used when calculating trigonometry? I used it in the 70s but again cannot remember how to use them now.
 
Never used slide rule, we had scientific calculators that had all the trig functions. But when i was culling stuff earlier this year I found a box of high school essays and my HSC study notes. Looked at the maths formulas we had to memorise and realised i no longer had any idea how to apply most of them. Cant say that calculus has ever been of any use to me outside of school/uni.
 
anat0l said:
Alright, because the Mathematics thread is dead, a quick off-hand poll:

How many people here could and used to use a slide rule and/or mathematical lookup tables (book of tables)?

Of those of you who answered in the affirmative, do you think you could still use one or both today?
Click to expand...
Yes
No to slide rule,
Yes to log tables.

PS @anat0l - threads can be reopened if you ask - just ‘report’ the last post with a request
 

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