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What are the factors of 31?

Most numbers have positive factors other than themselves and 1. For example, the positive factors of 12 are 1, 2, 3, 4, 6, and 12. There are many special numbers, including 31, that are called "prime numbers." Any number that can only be divided evenly by itself and 1 are defined as prime numbers. The remaining whole numbers are composite numbers. The only exception is the number 1, which is considered neither composite nor prime by mathematicians.

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What are some examples of 5th grade math problems?

According to Homeschool Math, in the fifth grade, students learn place value, rounding, addition, subtraction, multiplication and division of multi-digit numbers, decimals, fractions and converting fractions to mixed numbers and decimals. Some fifth graders learn beginning algebra and beginning geometry.\nHere are some problems that cover these concepts:\nPlace value\n________ + 7000 + 300 + 80 + 7 = 37,387 (answer: 30,000)\n________ + 4 + 7000 + 30,000 + 10 = 37,314 (answer: 300)\n8000 + _______ +80 + 5 + 10,000 = 18,485 (answer: 400)\nRounding\nRound 29,684 to the nearest hundred. (answer: 2..

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How do you solve math problems using a tape diagram?

For example, a tape diagram can be used in a simple addition problem that states that person A has 34 marbles and person B has 22 marbles, and the problem asks how many marbles they have together. Using a tape diagram, draw the first section of the tape, and assign it a value of 34, labeling it A underneath. After this, connect a smaller section of tape to the first section, and assign it a value of 22. The tape is now complete, and the two values can be added to calculate the answer to the problem, 56 marbles.\nA second type of problem may require two different tape diagrams. For example, if ..

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What is a good statistical sample size?

The more the sample size increases, the more the margin of error decreases. This is because by surveying a larger sample of people, the researcher is more likely to receive results that complement the viewpoint of the general population. By utilizing a smaller sample size, the researcher is skewing his results by basing them on the statistics given to him by a small percent of the population. The researcher's confidence rating is his guide to the probability of how accurate his research is. Most researchers utilize a 95 percent correct confidence level when conducting statistical research..

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What are some ways to teach shapes to kids?

Draw large circles, triangles, squares and other shapes on sidewalks or driveways with sidewalk chalk. Position the child at the top of the driveway and send her on a mission to find a particular shape. Gather ordinary household items of different shapes. Place them on a tray and ask the child to sort them by shape.

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What are the laws of exponents in math?

The power rule helps when raising a power to another power. The base of the expression stays the same, and the new exponent value is the product of the two exponent values.\nThe product rule of exponents applies when two exponential expressions with the same bases are multiplied. The expression can be simplified to one where the base stays the same, and the new exponent value is the sum of the two exponent values.\nThe quotient rule is similar to the product rule but is used when an exponential expression is divided by another with the same base. The simplified version has the same base, and t..

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What do you call a shape with eight sides?

"Octa-" is a prefix derived from the Greek and Latin languages meaning "eight." In addition to eight sides, an octagon also has eight internal angles and eight vertices. The interior angles of an octagon add up to 1080 degrees. A regular octagon has all sides of the same length, and all internal angles are 135 degrees. Another eight-sided figure, the eight-sided star, is called an octagram.

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How do you simplify fractions?

Find the greatest common factorMake a list of the factors of the numerator. A factor is a number that is able to be divided into another number. Make a separate list of the factors of the denominator. Find the highest common number between the two lists. This is the greatest common factor.\n\nFor example, in the fraction 6/18, the numerator's factors would be: 1, 2, 3 and 6. The denominator's factors would be 1, 2, 3, 6, 9 and 18. The highest common number between the two lists is 6. This is the greatest common factor.Divide the numerator by the greatest common factorDivide the numer..

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How do you find a printable list of Roman numerals?

Roman numerals arose out of the need to have a common counting system throughout the Roman empire. The system utilizes seven basic symbols that represent various numeric values. M is the largest number, equal to 1,000. D is 500, C converts to 100 and L is 50. V means five, X is units of 10 and I is one unit.\nWhen the symbols are utilized together to designate numbers, they are situated from left to right in decreasing order. The symbols are then either added or subtracted to arrive at the final number. One basic rule of Roman numerals is that one must use the largest symbol possible at each s..

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How is percent abundance calculated?

Because there are various isotopes of an element, its atomic weight is a calculation of the atomic masses and relative abundances of each isotope of that element. Using algebra, the atomic weights and respective relative abundance percentages of each isotope are multiplied and then added together to find the atomic weight of the element in question.To accurately measure the atomic mass of an element, a mass spectrometer is used. In this instrument, atoms are positively ionized, accelerated and then deflected by a magnetic field. The amount of deflection is partially determined by the element&a..

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