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# Help needed! Any maths whizzes available please?

£0.00 @
I have a very confusing question. I need fixed sequence for the following numbers: 4 0.25 4 0.25 ...... The question is, how do i get from 4 to 0.25 bck to 4 nd then 0.25. I hve tr… Read More
7y, 7m agoPosted 7 years, 7 months ago
I have a very confusing question. I need fixed sequence for the following numbers:

4 0.25 4 0.25 ......

The question is, how do i get from 4 to 0.25 bck to 4 nd then 0.25. I hve tried dividing by 16 nd multiplying by 16 which is wrong becuse it hs to be just one thing e.g either divde, subtrct, multiply or add. I hve not got an idea. Please help someone!
7y, 7m agoPosted 7 years, 7 months ago
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(22)
#1
subtract 3.75, then add 3.75, then subtract again :? tht was easy
#2
not sure myself but ive a few spare a's if you want them :thumbsup:
#3
micoo
subtract 3.75, then add 3.75, then subtract again :? tht was easy

It cn't be subtrct, then add. Has to be a fixed sequence. Thnk u for trying
#4
rumela
It cn't be subtrct, then add. Has to be a fixed sequence. Thnk u for trying

o right i see wht u mean nw lol :lol:
#5
richp
not sure myself but ive a few spare a's if you want them :thumbsup:

#6
mebbe check out that it's 4/1 and 1/4?
#7
Each term is the inverse of it's predecessor.

Term n = 1/(term n-1)

#8
scottygar
mebbe check out that it's 4/1 and 1/4?

i was thinking that but it doesnt really fit cos your not dividing by the same thing
#9
cosmicdav3
Each term is the inverse of it's predecessor.

Term n = 1/(term n-1)

What does that mean?:?
#10
its (4)^(-1)^n
as n increases it is either 1/4 or 4. I guess its something like that

Cosmicdav3 looks about right as well.
#11
rumela
What does that mean?:?

1/(1/4) = 4/1

1/(4/1) = 1/4

#12
Artonox
its (4)^(-1)^n
as n increases it is either 1/4 or 4. I guess its something like that

Cosmicdav3 looks about right as well.

This does give the answer 0.25 but does not go bck to 4 again. n can't change, it is constant.:oops:
#13
scottygar
1/(1/4) = 4/1

1/(4/1) = 1/4

Its not constant
#14
well if n=1 then its 4^(-1)=0.25
if n=2 then its 4^1 = 4
if n=3 then its 4^(-1) = 0.25 and so on
im not sure what you mean by n is a constant, i define n as the term in the sequence
so in this case the first term (when n=1) is 0.25, 2nd (when n =2) is 4 and so on.
#15
oh and by the way, if you want to find the next time from the previous term, then you just take cosmicdavs or scottygars advice.
#16
rumela
Its not constant

it doesnt need to be... i was just showing you how it would work... the sequence is 1 divided by the previous number in the sequence..
#17
Artonox
well if n=1 then its 4^(-1)=0.25
if n=2 then its 4^1 = 4
if n=3 then its 4^(-1) = 0.25 and so on
im not sure what you mean by n is a constant, i define n as the term in the sequence
so in this case the first term (when n=1) is 0.25, 2nd (when n =2) is 4 and so on.

Well done! I think you have cracked it. :thumbsup:
#18
1 divided by 4 = 0.25. 0.25 divided by 1 = 0.25.
#19
The Therapist
1 divided by 4 = 0.25. 0.25 divided by 1 = 0.25.

1 divided by 0.25 = 4 ;-)
#20
Artonox
well if n=1 then its 4^(-1)=0.25
if n=2 then its 4^1 = 4
if n=3 then its 4^(-1) = 0.25 and so on
im not sure what you mean by n is a constant, i define n as the term in the sequence
so in this case the first term (when n=1) is 0.25, 2nd (when n =2) is 4 and so on.

Yeah! Impressive!
#21
lol ty. But i must say, im no genius... im stayin up late to try and at least get something done for my uni coursework thats due in tomorrow hehehe. gonna get back to it.
#22
could it be:
4 - 3.75
& then
-(-3.75) to get back to 4

still using constant minus........ just my tuppennce worth mate