Brain Teasers and Logic Puzzles

Brain-teaser 12 equals soft the z?

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2009-12-24 22:02:28
2009-12-24 22:02:28

12 Signs of the Zodiac.

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12 signs of the Zodiac

z - 8 = -12; add 8 to both sides: z - 8 +8 = -12 + 8; therefore z = -4

z/6 = -5/12, cross multiply. z*12 =-5*6 z = -30/12 z= -5/2

12 = signs of the Zodiac

z/7 + 5 = 12 z/7 = 12 - 5 = 7 z = 7 x 7 = 49

x + y + z = 12 y = 1 x - y - z = 0 Substitute y = 1 in the other two equations: x + 1 + z = 12 so that x + z = 11 and x - 1 - z = 0 so that x - z = 1 Add these two equations: 2x + 0z = 12 which implies that x = 6 and then x + z = 11 gives z = 5 So the solution is (x, y, z) = (6, 1, 5)

divide each side by 12; Z=9

What is the area under the normal curve between z equals 0.0 and z equals 2.0?

-12z -9 equals -12z - 9. That is it!

The average is the sum of variables divided by their count. For an instance:x = 6y = 102z = 9The average will be( 6 + 102 + 9 ) / 3 = 117 / 3 = 39

2nd z=17 1st Z=22 Easy as ABC: Just do the following 39-5=___ ___divide by 2=z z+5=Z

in algebra, a 'value' is what a certain letter stands for. for instance... if z = 6 and the below is a balanced scale... .............................................. z x z Find the value of x = 12 because 2 sixes, (2 zs) equals 12!!!

xy + y = z xy = z - y (xy)/y = (z - y)/y x = (z - y)/y

-8 = z-11 Adding 11 on both the sides we get, z = 3

Add 4z to each side: 19 = -z so z = -19

I assume you are asking: z + 2 = 12Then z would be 12-2=10

I used the matrix method to find the answer: x=4, y=-7, z=-5.

It equals a linear equation in the single variable, z.


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