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# even odd strategy

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Intern
Joined: 14 Oct 2011
Posts: 2

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30 Oct 2011, 12:15
Hello All,

While I was working on a set of integer problem, I can across a pattern of "if x is even or odd" problems. Following is the format:
x=55^3 + 35 - 57 + 43^4 -51
x=32 - 44 - 42 + 40^4 -43
x=21 + 38 -15 + 25^3

So I want to know if there is a strategy to handle these kind of problems in limited time.

-
Shailesh

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Math Forum Moderator
Joined: 20 Dec 2010
Posts: 1964

Kudos [?]: 2050 [1], given: 376

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30 Oct 2011, 12:54
1
KUDOS
47shailesh wrote:
Hello All,

While I was working on a set of integer problem, I can across a pattern of "if x is even or odd" problems. Following is the format:
x=55^3 + 35 - 57 + 43^4 -51
x=32 - 44 - 42 + 40^4 -43
x=21 + 38 -15 + 25^3

So I want to know if there is a strategy to handle these kind of problems in limited time.

-
Shailesh

Almost zero calculation/arithmetic for such questions.

Refer:
math-number-theory-88376.html
Even and odd numbers

e.g.
x=55^3 + 35 - 57 + 43^4 -51
x=o*o*o+o-o+o*o*o*o-o=o+o-o+o-o=o
ODD.
_________________

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Intern
Joined: 14 Oct 2011
Posts: 2

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31 Oct 2011, 09:24
thanks fluke for the explanation and link

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Re: even odd strategy   [#permalink] 31 Oct 2011, 09:24
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