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Math History

Far more interesting than one might first expect, the history of mathematics is filled with bitter rivalries, political machinations, and incredible innovations by some of the most amazing minds in history. Post all questions concerning individual mathematicians, the development of mathematical theories, and the sociological impact that resulted into this category.

3,988 Questions

What does the k mean in 10k?

I think it refers to kilometers, there are 10 kilometers (6.2) miles to be run in a 10k race. or it refers to 10,000 (k=1,000)

Faces of a cube?

A cube has 6 square faces.

If the average of three numbers is V If one of the numbers is Z and another is Y what is the remaining number?

#1="a" #2="b" #3="c" (a+b+c)/3=V if a=Z and b=Y, Z/3+Y/3+c/3=V Therefore: c/3=V/(Z/3+Y/3) c=3*V/(Z/3+Y/3)

I've encountered that on my GRE review. The given are: A. ZY - V

B. Z/V - 3 - Y

C. Z/3 - V - Y

D. 3V- Z - Y

E. V- Z - Y

if the 3rd missing letter is X, then maybe (I just guessed, so I'm not sure):

z/3+y/3+x/3=V

x/3=V -z/3 -y/3

3(x/3)=(V -z/3-y/3)3 cancel all corresponding 3's and times 3 to V

x= 3V-z-y

the answer is D.

How many edges does a cubiod have?

A cuboid is a geometric solid figure that has six rectangular faces at right angles to each other. It has 12 edges and 8 vertices.

How many metres are there in 10 feet?

One foot is equal to 0.3048 metres. Therefore, 10 feet is equal to 0.3048 x 10 = 3.048 metres.

How many feet is there in 320 meters?

320 meters=1,049.86877 feet

Algebraic Steps / Dimensional Analysis 320 m*100 cm

1 m*1 in

2.54 cm*1 ft

12 in=1,049.868766 ft

How do you make an abacus?

To make an abacus, the first thing to do is to make a frame, the wooden edge around an abacus. Then add the separator, the wooden line about 1/3 at the top and 2/3 at the bottom. And then start making the coloum for the beads. Your abacus will then look excactly like this original Chinese abacus picture:Frame: the wooden edges around an abacus

Separator: the wooden line that stretches from the left to the right side of the abacus which separates the top and bottom part of the abacus

Coloumns: the thin wooden sticks which holds the beads

Beads: The rounded wood for counting

By: Valerie

Username: Valerie_Limasi

Who invented the addition sign?

The plus or addition sign was invented by Michael Stiple in 1544