leakcamille8953
10.02.2020 •
Mathematics
[] + [] + [] =30... Use this number below to complete find the solution...
1,3,5,7,9 and 15.
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Ответ:
answer:
(5+1)+9+15
Just using the numbers given there, it's not possible, because odd + odd = even, even + odd = odd. 30 is an even number, the answer of 3 odd numbers must be odd, it's a contradiction.
If what people say is true, then the question is wrongly phrased its any number of operations within those three brackets must lead to 30. Then it becomes a lot easier. Such as 15 + 7 + (7 + 1). That would give 30. But it assumes something that the question does not state explicitly and cannot be done that way. I still stick to my first point, it can't be done within the realm of math and just using three numbers, if not, then the latter is a way to solve it.
EDIT: This question has come up many times, Any odd number can be expressed as the following,
Let n,m,p be an odd number,
n=1(mod 2),m=1(mod 2),p=1(mod 2)
n+m+p=1+1+1(mod 2)
Let's call n+m+p as x
=>x=3(mod 2)
Numbers in modulo n can be added, I'll write a small proof for it below,
a=b(mod n),c=d(mod n)
a+c=b+d(mod n)
We can rewrite b and d in the following way,
n|(b−a)=>b−a=n∗p (for some integer p) b=a+np
b=a+np,d=c+nq
b+d=a+np+c+nq
b+d=a+c+n(p+q)
Now we have shown that our result is true, moving forward,
3=1(mod 2)
x=1(mod 2)
Therefore the sum of three odd numbers can never be even. It will always be congruent to 1 in mod 2.
Step-by-step explanation:
plz brainliest
Ответ:
A.) Line WZ has the same slope as line XY.
C.) Line YX has a greater slope than line ZY.
D.) Line ZW has the same y-intercept as line YZ.
Step-by-step explanation: