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How many balls are there /b/?
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Thread replies: 56
Thread images: 5
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How many balls are there /b/?
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>>688313882
enough to fill up ur mum
>>
>>688313882
over 9000
>>
>>688313882
atleast 7
>>
>>688313882
9^2!
>>
This is now a get thread.

Check em.
>>
(sqrt(3)/4 * 9^2)+(sqrt(3)/4 * 8^2)+...
>>
>>688313882
Not enough for op
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>>688313882
285
>>
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>>688314076
81
/thread
>>
>>688313882
8
>>
Only 2 in my sac. But I know a guy with 3
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>>688314247
Poor misled little thing, you can't /thread your own post.
>>
165

Some decent balls in there, for their eras
>>
204
>>
>>688314441
165 pleb. it's fucking 284 you all suck summer fags
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>>688314234
yep
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>>688313882
163
>>
285
>>
>>688314507
Math?
For 165
9+8+7+6+5+4+3+2+1
8+7+6+5+4+3+2+1
7+6+5+4+3+2+1
Etc until you have your answer
>>
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>>688313882

420
>>
165 OP
>>
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i don't care
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>>688314568
How I got it:
9x9 + 8x8 + 7x7 + 6x6 + 5x5 + 4x4 + 3x3 + 2x2 + 1x1 = 285
>>
>>688313882
>the inside of the tetrahedron is actually empty and all you fags got it wrong
>>
the answer is always 42
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>>688314772
Wrong
Base is a triangle not a square faggot
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>>688314772
But it's a triangle
>>
>>688314441
Winrar
>>
>>688314234
This
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>>688314896
No it's a squire, u imbosile.
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>>688313882
There are 109 balls in that pyramid
1 on top
1×3 = 3
2×3 = 6
3×3 = 9
4×3 = 12
5×3 = 15
6×3 = 18
7×3 = 21
8×3 = 24
>>
>>688315157
Except it's a square not a triangle.
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>>688315216
NO ITS A SQUIRE U FUCKING IMBOSILE MY GOD HOW FUCKING OLD ARE YOU KID? PASS GRADE 3 BEFORE YOU FUCKING INSULT PEOPLES INTELLIGENSE YOU FUCKING KIDDO
>>
Bunch of summerfags in here, the only answer is 165
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>>688315292
RIP english
>>
>>688313882
bout tree fiddy
>>
the factorial method makes sense
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>>688315373
FUCK YOU
>>
>>688315216
The retardation is emanating off this post
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>>688313882
284?
>>
>>688315448
Ur d only retard here fag
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1+(1+2)+(1+2+3)+(1+2+3+4)+(1+2+3+4+5)+(1+2+3+4+5)+(1+2+3+4+5+6)+(1+2+3+4+5+6+7)+(1+2+3+4+5+6+7+8)+(1+2+3+4+5+6+7+8+9)=165 faggots
>>
>>688313882
165
>>
>>688313882

If the height of the pyramid is N

The total number of balls is

SUM (from J=0 to J=N-1)
of
(J+1)*(N-J)

Since the height of this pyramid is 9 you get 165.
>>
>>688314797
>tetrahedron
It's a fucking triangle
>>
>>688314596
the only real answer
>>
They teach this to 8 year olds.
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Fuckwads. Its 285
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>>688314437
Looks like he did. Just like I'm about to.

You faggot
/thread
>>
>>688315676

tetrahedron means 4 sides.

a pyramid with a triangle base is a tetrahedron.

look up "4-sided dice"
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>>688314797
>tetrahedron
look at this faggot
stupid summerfag
>>
109 if its hollow
>>
the sequence of growing triangles as you add on a new row is
1, 1+2, 1+2+3, 1+2+3+4, etc

so with the tetrahedron of 9 stacks, we have
9x1+8x2+7x3+6x4+5x5+4x6+3x7+2x8+1x9 =
165
>>
>>688314772
Correct.
>>
To lazy to count it out, but I'd assume you could start at the bottom,
>9+8+7+6+5+4+3+2+1
Next layer
>8+7+6+5+4+3+2+1
So on and so forth?
Thread replies: 56
Thread images: 5

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