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October 18th, 2009, 10:55 PM
| | Newbie | | Join Date: Oct 2009
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| |  matlab code helpppp :(
helpp!! i need a MATLAB CODE!
2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
What is the smallest number that is evenly divisible by all of the numbers from 1 to 20?
i need the matlab code for this it is so confusing i got other codes but they do not seem to be working |
October 19th, 2009, 12:16 AM
|  | Grand Panjandrum | | Join Date: Nov 2005 Location: South of England
Posts: 11,375
Country:  Thanks: 667
Thanked 3,618 Times in 2,915 Posts
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Quote:
Originally Posted by savni98  helpp!! i need a MATLAB CODE!
2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
What is the smallest number that is evenly divisible by all of the numbers from 1 to 20?
i need the matlab code for this it is so confusing i got other codes but they do not seem to be working | First decide what algorithm you are going to employ, then post it here and explain what it is with the algorithm you are having trouble turning into code.
CB
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Giordano Bruno |
October 19th, 2009, 02:28 PM
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i got some of the code i think i dont know what to do ??
for i = 20:2:1000000000
t = 0;
for j = 2:20
t += 1
end
end
if t == 19
without the code it goes
20=2*2*5
19
18=2*3*3
17
16=2*2*2*2
15=3*5
14=2*7
13
12=2*6
11
10=2*5
9=3*3
8=2*2*2
7
6=2*3
5
4=2*2
3
2
1
2*2*2*2*3*3*5*7*11*13*17*19=232,792,56 |
October 20th, 2009, 02:06 AM
| | Grand Panjandrum | | Join Date: Nov 2005 Location: South of England
Posts: 11,375
Country: Thanks: 667
Thanked 3,618 Times in 2,915 Posts
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Quote:
Originally Posted by savni98 i got some of the code i think i dont know what to do ??
for i = 20:2:1000000000
t = 0;
for j = 2:20
t += 1
end
end
if t == 19
without the code it goes
20=2*2*5
19
18=2*3*3
17
16=2*2*2*2
15=3*5
14=2*7
13
12=2*6
11
10=2*5
9=3*3
8=2*2*2
7
6=2*3
5
4=2*2
3
2
1
2*2*2*2*3*3*5*7*11*13*17*19=232,792,56 | Start with p=20, then loop from n= 19 down to 1 with update p=lcm(n,p)
so the core code would look something like: Code: p=20
n=19:-1:1
p=lcm(p,n);
end
CB
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