Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

## #1 2012-12-31 18:29:46

mathaholic
Star Member

Offline

### Logarithm game!

If you don't know logarithms yet, please go here: http://www.mathsisfun.com/algebra/logarithms.html
Okay! Questions!
Fill in the blank.
1) log4(___)=3
2) log2(81)=__

Last edited by julianthemath (2012-12-31 18:31:15)

246 pages on Prime Numbers Wiki (+1)

## #2 2012-12-31 21:16:16

Agnishom
Real Member

Online

### Re: Logarithm game!

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Who are you to judge everything?' -Alokananda

## #3 2013-01-01 01:09:33

bobbym

Offline

### Re: Logarithm game!

Hi;

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #4 2013-01-01 01:25:33

muxdemux
Full Member

Offline

### Re: Logarithm game!

Last edited by muxdemux (2013-01-01 01:25:56)

## #5 2013-01-01 11:01:06

mathaholic
Star Member

Offline

### Re: Logarithm game!

1=Agnishom, Bobbym
2=
3) log3(8)=__
4) log__(64)=8

Last edited by julianthemath (2013-01-01 11:01:34)

246 pages on Prime Numbers Wiki (+1)

## #6 2013-01-01 11:07:28

bobbym

Offline

### Re: Logarithm game!

Hi;

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #7 2013-01-01 11:10:56

mathaholic
Star Member

Offline

### Re: Logarithm game!

3=
4=
Okay!
5. log2(121)=__
6. log4(___)=5

246 pages on Prime Numbers Wiki (+1)

## #8 2013-01-01 11:13:59

bobbym

Offline

### Re: Logarithm game!

Hi julianthemath;

I think you mean for 5

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #9 2013-01-01 11:17:43

muxdemux
Full Member

Offline

### Re: Logarithm game!

Hey! What's wrong with my answer for 2?

## #10 2013-01-01 12:53:08

mathaholic
Star Member

Offline

### Re: Logarithm game!

5=11
6=625
Muxdemux, sorry about that.
Bobbym, I don't mean that!
Muxdemux, I think that is not correct in 6.
Anyways,
7. log3(___)=5
8. log6(64)=__

246 pages on Prime Numbers Wiki (+1)

## #11 2013-01-01 13:17:39

muxdemux
Full Member

Offline

### Re: Logarithm game!

I think bobby is right, man.

but
.

I'm getting
and
for Q7 and Q8, respectively.

## #12 2013-01-01 13:18:35

scientia
Full Member

Offline

### Re: Logarithm game!

@julianthemath

The correct formula is
, not loga(na) = n. This is what you seem to be confusing.

## #13 2013-01-01 15:15:15

mathaholic
Star Member

Offline

### Re: Logarithm game!

Okay, scientia. I might not do this well. Ask bobbym to close the thread.

246 pages on Prime Numbers Wiki (+1)

## #14 2013-01-01 15:36:24

muxdemux
Full Member

Offline

### Re: Logarithm game!

Nah, come on! It's an easy mistake to make. Keep going!

## #15 2013-01-01 17:55:38

mathaholic
Star Member

Offline

### Re: Logarithm game!

I am a bit shy! Just make a similar thread to this and I will join your topic.

246 pages on Prime Numbers Wiki (+1)

## #16 2013-01-02 00:40:17

bobbym

Offline

### Re: Logarithm game!

Hi julianthemath;

Okay, scientia. I might not do this well. Ask bobbym to close the thread.

I will keep it open a bit longer in case you change your mind.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #17 2013-01-02 07:37:55

noelevans
Full Member

Offline

### Re: Logarithm game!

julianthemath,  Have you see the fact that

logy       logx
x        = y         which is still true for any positive base b (not 1) and positive x and y?

One might get some interesting variations on these log problems using this fact.

Writing "pretty" math (two dimensional) is easier to read and grasp than LaTex (one dimensional).
LaTex is like painting on many strips of paper and then stacking them to see what picture they make.

## #18 2013-01-03 11:26:06

mathaholic
Star Member

Offline

### Re: Logarithm game!

Whoops!

246 pages on Prime Numbers Wiki (+1)