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

julianthemath
Super 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)

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.

## #2 2012-12-31 21:16:16

Agnishom
Super Member

Offline

### 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'
'The whole person changes, why can't a habit?' -65

## #3 2013-01-01 01:09:33

bobbym

Online

### Re: Logarithm game!

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #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

julianthemath
Super 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)

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.

## #6 2013-01-01 11:07:28

bobbym

Online

### Re: Logarithm game!

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #7 2013-01-01 11:10:56

julianthemath
Super Member

Offline

### Re: Logarithm game!

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

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.

## #8 2013-01-01 11:13:59

bobbym

Online

### Re: Logarithm game!

Hi julianthemath;

I think you mean for 5

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #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

julianthemath
Super Member

Offline

### Re: Logarithm game!

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

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.

## #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

julianthemath
Super Member

Offline

### Re: Logarithm game!

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

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.

## #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

julianthemath
Super Member

Offline

### Re: Logarithm game!

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

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.

## #16 2013-01-02 00:40:17

bobbym

Online

### 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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #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

julianthemath
Super Member

Offline

### Re: Logarithm game!

Whoops!

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.