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forum.virtualchallengemeets.com • View topic - Soy de
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Soy de

PostPosted: Fri Mar 09, 2012 7:39 am
by smeag
NEed help on :

44 base 8 X 4 base 8 = base 8

(67 base 9 + 84 base 9)/ 8 has a remainder of

The area of 20X^2 + 45X^2 = 900

THe eleventh term of 6, 11, 16, 21 is

Re: Soy de

PostPosted: Fri Mar 09, 2012 6:18 pm
by nsguy1350
Just do regular multiplication, but write and carry in base 8.

4x4 = 16 = 20 base 8, so write 0, carry 2.
4 x 4 + 2 = 18 = 22 base 8, write 22.

Since the divisor is one less than the base of the dividend, you can just perform the necessary operations on the digits, and add the digits of each number to "simplify them".
(6+7) + (8+4) / 8 = 25 / 8 which has a remainder of 1.

Put it in standard form: [unparseable or potentially dangerous latex formula] .
Now, you can see that [unparseable or potentially dangerous latex formula] and [unparseable or potentially dangerous latex formula] Since [unparseable or potentially dangerous latex formula], you can just multiply and approximate to get your answer. [unparseable or potentially dangerous latex formula][unparseable or potentially dangerous latex formula]. The margins are tight, but hopefully that's right.

If it asks you to find the nth term of an arithmetic sequence, take the common difference, d, and multiply it by (n-1). Then, add that to the first term to get your answer.
[unparseable or potentially dangerous latex formula].