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Maths SENIOR CHALLENGE!
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#21
(Original post by GingerIsKing)
I have that tomorrow as well. I have not done any before and have only recently seen a past paper.
I have that tomorrow as well. I have not done any before and have only recently seen a past paper.
Relax. It's not an exam. You're supposed to enjoy it...
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#22
E is correct
W, X,Y,Z are all prime and 2002 is even so W say is 2
Therefore 2*1001
Product of Three no is ~ 1000 so each must be around 10
clearly 3, 5 not true, 7? yes 7 *143
so 2*7*143
2*7*11*13
so 2^2=4
7^2=49
11^2=121
13^2=169
Sum = 343 ans E
W, X,Y,Z are all prime and 2002 is even so W say is 2
Therefore 2*1001
Product of Three no is ~ 1000 so each must be around 10
clearly 3, 5 not true, 7? yes 7 *143
so 2*7*143
2*7*11*13
so 2^2=4
7^2=49
11^2=121
13^2=169
Sum = 343 ans E
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#23
(Original post by Phil_C)
E is correct
W, X,Y,Z are all prime and 2002 is even so W say is 2
Therefore 2*1001
Product of Three no is ~ 1000 so each must be around 10
clearly 3, 5 not true, 7? yes 7 *143
so 2*7*143
2*7*11*13
so 2^2=4
7^2=49
11^2=121
13^2=169
Sum = 343 ans E
E is correct
W, X,Y,Z are all prime and 2002 is even so W say is 2
Therefore 2*1001
Product of Three no is ~ 1000 so each must be around 10
clearly 3, 5 not true, 7? yes 7 *143
so 2*7*143
2*7*11*13
so 2^2=4
7^2=49
11^2=121
13^2=169
Sum = 343 ans E
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#24
(Original post by Ralfskini)
Why have you assumed that for the product of three numbers to be about 1000 for them all to be roughly equal to 10?
Why have you assumed that for the product of three numbers to be about 1000 for them all to be roughly equal to 10?
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#27
(Original post by ZJuwelH)
Two of which are not primes...
Two of which are not primes...
I wasn't suggesting that as a possible answer, just that the numbers dont have to be approximately equal to 10. Does anybody else see where I'm coming from?
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#28
(Original post by Ralfskini)
Yes but 10 isn't prime. I'm just saying......
I wasn't suggesting that as a possible answer, just that the numbers dont have to be approximately equal to 10. Does anybody else see where I'm coming from?
Yes but 10 isn't prime. I'm just saying......
I wasn't suggesting that as a possible answer, just that the numbers dont have to be approximately equal to 10. Does anybody else see where I'm coming from?
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#29
(Original post by ZJuwelH)
I know but the assumption seemed to work. No need to fix what ain't broke...
I know but the assumption seemed to work. No need to fix what ain't broke...
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#30
(Original post by Ralfskini)
True it worked but it was not logical. Its like saying 'two numbers have to add together to make 50 so ill just assume that each one is approximately equal to 25.' What about 49 + 1?
True it worked but it was not logical. Its like saying 'two numbers have to add together to make 50 so ill just assume that each one is approximately equal to 25.' What about 49 + 1?
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#31
(Original post by ZJuwelH)
Try looking at the answer without the 10 bit. Looks better like that I reckon.
Try looking at the answer without the 10 bit. Looks better like that I reckon.
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#33
(Original post by Ralfskini)
Why have you assumed that for the product of three numbers to be about 1000 for them all to be roughly equal to 10?
Why have you assumed that for the product of three numbers to be about 1000 for them all to be roughly equal to 10?
PC
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#34
Your idea of investigating two values suming to 50 so go in the middle is not similar, unless there was further evidence that the values we are looking at are around the middle. In this instance I knew they could not be large and key small primes didn't fit. It is then a case of knowing your tables or a logical search
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#35
Good luck all with the Senior Maths Challenge!!!
Any mod going to make a short-term sticky on it???
Any mod going to make a short-term sticky on it???
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#38
(Original post by Ralfskini)
So, did anybody take the challenge or what?
So, did anybody take the challenge or what?
How do you think you did?
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Well! I did the test today and it was hard! hope you all did well in it!
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#40
(Original post by sock)
I took it. I think it went ok, but on some questions I ended up with answers that weren't any of the choices, whoops. I suck at maths, so I'm not gonna be upset when I don't get a certificate.
How do you think you did?
I took it. I think it went ok, but on some questions I ended up with answers that weren't any of the choices, whoops. I suck at maths, so I'm not gonna be upset when I don't get a certificate.
How do you think you did?
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