Math Is Fun Forum

Agnishom

Real Member

From: Riemann Sphere

Registered: 2011-01-29

Posts: 24,996

Website

A Nice Clock

I dont get the 10 and 11

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'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'
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John E. Franklin

Member

Registered: 2005-08-29

Posts: 3,588

Re: A Nice Clock

log base e of 55 is too big for 4, should be 54.5981500331

as

2.718281828459045235 ^ 4 is 54.5981500331

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igloo myrtilles fourmis

muxdemux

Member

Registered: 2012-12-23

Posts: 80

Re: A Nice Clock

Ten is the the acceleration of Earth's gravity, 9.82 m/s/s. Some versions of this clock have it written as

so it equals 10 exactly.

Eleven is written in hexadecimal. In decimal, we have numbers 1 to 9, but in hexadecimal, as well as 1 to 9 there's 'a' to 'f' so you can keep counting: a equals ten, b equals eleven and so on. The zero at the front of '0b' doesn't make any difference here. It's just like writing the number three (in decimal) as 03.

Last edited by muxdemux (2013-01-25 20:27:42)

Agnishom

Real Member

From: Riemann Sphere

Registered: 2011-01-29

Posts: 24,996

Website

Re: A Nice Clock

Great Ideaz

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'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'
I'm not crazy, my mother had me tested.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: A Nice Clock

Hi Agnishom;

Nice clock! So far nobody has argued with 7 o'clock.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Mathegocart

Member

Registered: 2012-04-29

Posts: 2,226

Re: A Nice Clock

Nice Clock,Agnishom.I  WANT THAT CLOCK *buys*

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The integral of hope is reality.
May bobbym have a wonderful time in the pearly gates of heaven.
He will be sorely missed.

n872yt3r

Member

Registered: 2013-01-21

Posts: 392

Re: A Nice Clock

I want that it's so cool!
Here's an explanation for younger kids (like me):
1: The tangent of a 45 degree angle is 1.
2: The square root of 4 is 2. (2 x 2 = 4)
3: If you round pi, (3.141592653589796264) you end up with 3. (1<4.)
4: The logarithm of 55 is 4.
5: x^2=3^2+4^2. 3 x 3 = 9. 4 x 4 = 16. 16 + 9 = 25. 5 x 5 = 25.
6: The factorial of 3 is 6.
7: If you round 6.9, you get 7.
8: 16/2=8
9: 3 x 3 = 9.
(For 10 and 11, look at the explanations above.)
What is 12?

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- n872yt3r
Math Is Fun Rocks!
By the power of the exponent, I square and cube you!

Bob

Administrator

Registered: 2010-06-20

Posts: 10,619

Re: A Nice Clock

hi

5: x^2=3^2+4^2. 3 x 3 = 9. 4 x 4 = 16. 16 + 9 = 25. 5 x 5 = 25.

Strictly it should be root (3^2 + 4^2)

7: If you round 6.9, you get 7
no rounding needed.  That's 9 recurring there.

What is 12?
that's 12 in binary (base 2)

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

n872yt3r

Member

Registered: 2013-01-21

Posts: 392

Re: A Nice Clock

Oh... I get it. 0 ones 0 twos 1 four 1 eight!

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- n872yt3r
Math Is Fun Rocks!
By the power of the exponent, I square and cube you!

Bob

Administrator

Registered: 2010-06-20

Posts: 10,619

Re: A Nice Clock

I think you have it, but take a look at

http://www.mathsisfun.com/binary-number-system.html

And there's a cool converter at

http://www.mathsisfun.com/binary-decima … erter.html

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Agnishom

Real Member

From: Riemann Sphere

Registered: 2011-01-29

Posts: 24,996

Website

Re: A Nice Clock

7: If you round 6.9, you get 7.

I was talking about 6.9999.... which is exactly 7 and not a round-off of it

Proof:
Let x = 6.999....
Now, 10x = 69.99999....
Subtracting those equations, 9x = 63
Therefore, x = 7

Thus, 6.999... = 7 [Q.E.D]

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'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'
I'm not crazy, my mother had me tested.

n872yt3r

Member

Registered: 2013-01-21

Posts: 392

Re: A Nice Clock

I get it... just like 1/3 is never exact, it's 3.333333333 but then it would have to be the only 1/3. Is that it?

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- n872yt3r
Math Is Fun Rocks!
By the power of the exponent, I square and cube you!

Agnishom

Real Member

From: Riemann Sphere

Registered: 2011-01-29

Posts: 24,996

Website

Re: A Nice Clock

Yes, its like that ... "the recurring decimal"

Note that 1/3 = 0.333... and not what you wrote

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'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'
I'm not crazy, my mother had me tested.

magicschoolbus123

Member

Registered: 2013-08-15

Posts: 18

Re: A Nice Clock

The 12 one is the binary number

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: A Nice Clock

The 5 is the best one.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.