Math

Refine Search

Select the next number in the series: 16, 26, 21, 31, __?

Logically, the next number differs from 31 by -5, so the answer is 26. A number sequence is a set of limited numbers with a relationship of some sort to which one must come up with the missing number. Number sequences often appear as problems on standardized tests. Arithmetic and geometric sequences are most frequently seen, but many sequences fall into neither category.

Continue Reading

What does the "K" stand for in "100K"?

When K refers generally to the prefix "kilo," it is in instances where a large number is being used. For instance, a salary of $100,000 per year could be referred to in abbreviated fashion as "$100K."\nThe 100-kilometer ultra-marathon, equivalent to approximately 62.14 miles, is one of the more common lengths of that type of race. Other common lengths include: 50 kilometers, 50 miles and 100 miles, although the 100-kilometer race is recognized as an official world record event.

Continue Reading

How many millimeters are in an inch?

A millimeter is one-thousandth of a meter, which is the International System of Units base unit for length. According to Metric-Conversions.org, millimeters are used as a standard measure of length in engineering and commercial applications where accuracy greater than the closest centimeter is required. A formula for converting millimeters to inches is: millimeters = inches / 0.03937. For example, the number of millimeters in 1 foot is given by 12 (the number of inches in 1 foot) divided by 0.03937, which yields 304.8 millimeters. The head of a pin head measures approximately 2 millimeters in ..

Continue Reading

Where can you get help for algebra inequalities?

Algebra-Class.com's website owner is a math teacher who created the site with the goal of helping learners have an easier time understanding algebra. It takes complex algebra equations and breaks them down into simple problems. It has a variety of useful algebra resources, including an algebra readiness test, algebra cheat sheets, worksheets and practice exams.\nRod Pierce DipCE BEng maintains MathsisFun.com. The website gives detailed steps for solving most types of algebra problems that involve inequalities. It also provides an illustrated math dictionary.

Continue Reading

What is the biggest number known?

When someone sees the number, they generally see the shorter version of the number 1 and then 10 to the 100th power. In mathematics, this number is not specially significant in any way. Someone may use it when they are trying to compare something to a very large amount, such as hypothetical chess game moves or how many subatomic particles exist. Other names for this huge number include ten thousand sexdecillion, ten duotrigintillion and ten sexdecilliard.

Continue Reading

Is every integer a rational number?

While true that all integers are rational numbers, all rational numbers are not integers. Rational numbers include fractions that are not whole numbers and, therefore, are not integers. Any whole number, positive or negative, has one or more fractions that are equal to it, so all whole integer are rational numbers. For instance, 4= 4/1 and 8/2, 0=0/5 and -10 = -40/4. On the other hand, 1/2 is a rational number, but it is not an integer because it does equal a whole number.

Continue Reading

What are the factors of 14?

Factors are numbers that are evenly divided into each other. To find a factor, determine which numbers can divide the number in question equally. Using 14, 1 divides evenly into 14 exactly 14 times, and 2 divides 14 equally 7 times. This means that the factors of 14 are 1, 2, 7 and 14. Because all numbers are equally divisible by themselves, the pairing of 1 and the number itself is generally left out of the factoring. A number that is only divisible by 1 and itself is called a prime number.\nThe listing of all the factors of a number is called factoring. One method of listing all the factors ..

Continue Reading

What are some tips for subtracting decimals?

Lining up the decimal point ensures that each digit in the bottom number gets subtracted from the digit with the same place value in the top number's digits. The number in the 10s place in the bottom number must be subtracted from the 10s-place digit in the top number.\nFor numbers with nothing to the left of the decimal point, such as .145, add a zero to the left as a placeholder. Even when not doing this in the calculation steps, it is standard to add a zero on the left for the answer in laboratory notes and published work. Examples are "0.39598 milligrams" and "$0.27."

Continue Reading

How do you calculate exponential growth and decay?

Determine if there is population growth or decayDetermine if this is a growth or decay problem by observing the value of the "k." If this value is positive, then the population is growing. If the value is negative, then there is population decay. Determine the number of time periodsDetermine the number of time periods to find the value of "t." This value should be in the same units as the rate of growth and may require some basic math. For instance, if the rate is per month and the time elapsed is three years, the value for "t" will be 36. Perform the calculationsCalculate the value for the ..

Continue Reading

What does quadratic mean?

One well-known application of quadratics is the quadratic formula. It is used to determine the roots of a quadratic equation. The roots can be thought of as the places where the quadratic equation equals zero and can be either real or complex numbers.\nWhen graphed on a coordinate plane, a quadratic will take the shape of a parabola.

Continue Reading
Showing 3791 to 3800 of 3956 (396 Pages)