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What does an "18 KGP" stamp on a piece of gold mean?

Gold plating is used instead of solid gold because a solid piece of gold is exorbitantly expensive to use in any substantial quantity. Alloys are used instead of pure 24K gold for a number of reasons. In some cases, it is to increase the hardness of the metal. In other cases, it is to alter the color and appearance of the gold. White gold, for example, is typically gold mixed with silver, palladium, platinum or nickel.

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What are the factors for the number 63?

The factors of a number are the whole numbers which, when multiplied together, create that number. Or, to reverse that statement, factors divide evenly into a number without a remainder or fraction. Therefore, 1 and the number itself are always factors. In the case when a number has no other factors than 1 and itself, it is known as a "prime" number.However, most numbers, including 63, have multiple factors. In this case it is necessary to conduct a series of tests using basic division to determine which numbers are, indeed factors. Since factors of a number divide evenly with no remainder, be..

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What are some algebra riddles?

Consider a few algebra riddles that are arithmetic problems with letters. Solve for each letter, where a five-digit number multiplied by 3 is a number with its digits in reverse order (ABCDEF x 3 = BCDEFA). Solve for each letter where the product of two three-digit numbers is 123456 (ABC x DEF = 123456) knowing that A = 1. Solve for each letter where the sum of two four-digit numbers can be represented by CHOO + CHOO = TRAIN.

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What is the flat surface of a solid figure?

Three-dimensional objects can either have flat faces or curved surfaces. A "prism" is a solid plane figure with four lateral faces on the sides and two parallel faces called "bases" at the top and bottom. A "cube" contains six identical square faces, while a "dodecahedron" has 12 pentagonal faces that are all equal in size and shape. An "octahedron" has eight triangular faces, while an "icosahedron" contains 20 triangular faces. A "cylinder," meanwhile, has two circular faces.

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Who discovered the number zero?

While the concept of nothing or zero was fully developed in ancient times, ancient people did not use the symbol as a placeholder as in modern times. The first arithmetic operations using zero were performed in India in the seventh century. It was not until the 17th century that division by zero was solved independently by Isaac Newton and Gottfried Leibniz, and this opened remarkable possibilities in arithmetic, finance and economics.

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How do you factor (x^2-2x-4)?

To complete the square, begin by writing the polynomial as x^2 - 2x = 4. Note that the left-hand side can be factored into (x - 1)^2 if 1 is added to the expression. The number 1 must also be added to the right-hand side so the polynomial remains the same: x^2 - 2x + 1 = 4 + 1. Now the polynomial simplifies to (x - 1)^2 = 5. Solve this expression for the value of x by taking the square root of both sides and adding 1 to both sides. The right-hand side can be either the positive or the negative square root of 5; thus, there are two possible solution values for x: x = 1 + sqrt(5) or x = 1 - sqrt..

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What is a constant of variation?

The constant of variation is either the slope or the inverse of the slope in a simple linear equation. Constants in algebraic expressions are values that do not change. When two variables are directly proportional, the increase in one leads to an increase in the other.\nSpeed and distance are two such variables. As the speed of a moving object increases, the distance traveled in a fixed amount of time increases. In this example, the fixed time is the constant of variation that ties the variables speed and distance together. Fixing the speed and relating the distance traveled to the time elapse..

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How do you solve equations with variables on both sides?

While an equation with variables on both sides can look intimidating, the steps to solve it are quite easy. Use the equation 5y-3=3y+5 as an example.Move the constants to the rightMove the constants to the right by subtracting or adding to both sides. In the example equation, this step would be 5y-3+3=3y+5+3. Each side has to be treated the same. Then simplify to 5y=3y+8.Move the variables to the leftMove the variables to the left of the equation by subtracting or adding to both sides. Using the example equation, this step would be 5y-3y=3y-3y+8. Remember to do the same thing on both sides. Th..

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How do you find the slant asymptotes of rational functions?

In most cases, the results of the long division produce a polynomial that has a similar graph to the original function. These graphs indicate that there is only a slight difference between the graph of a function and its slant asymptote if the difference in their degrees is 1.\nAn asymptote is a line similar to the x-axis or the y-axis that the curve approaches but does not cross. Other types of asymptotes that relate to rational functions are the horizontal and vertical asymptotes. A vertical asymptote is calculated by finding the roots of q(x) without involving the numerator, as only the den..

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How do you write 49 in Roman numerals?

Learn the values of Roman numeralsI is 1. V is 5. X is 10. L is 50. C is 100. D is 500. M is 1000. Learn the rulesNo numeral appears more than three times in a row. If the numeral to the left is larger, then it is added to the numeral to the right. If the left numeral is smaller, then it is subtracted from the numeral to the right. Address each place value left to right40 is XL. 9 is IX. So 49 is XLIX.

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