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Numbers

Numbers are our way to quantify, label, and organize the world around us in a logical manner. However, the systems used to obtain this goal differ geographically, historically, and by relative utility. All questions pertaining to numbers, including historic labeling systems, bases of numerical systems, constants, and the various ways they're grouped together, should be placed into this category.

46,867 Questions

How do you write 123402 in words?

One hundred twenty-three thousand, four hundred two.

How is a natural number defined?

Natural numbers are the positive integers used for counting and ordering discrete objects. They represent either a single unit or the sum of a collection of units. They cannot be broken down into parts since they are whole numbers and are not continuous. They also do not include zero. Subsets of natural numbers include the cardinal numbers used for counting and the ordinal numbers used for indicating position. The natural numbers are the direct result of the arithmetical operations of addition and multiplication.

Why is pi an irattional number?

Pi is an irrational number because it can't be expressed as a fraction.

How do you write 575 in word?

Five and seventy-five hundredths.

What are the prime numbers from 300 to 700?

prime numbers from 300 to 700:307,311,313,317,331,337,347,349,353,359,367, 373,379,383,389,397,401,409,419,421,431,433, 439,443,449,457,461,463,467,479,487,491,499, 503,509,521,523,541,547,557,563,569,571,577, 587,593,599,601,607,613,617,619,631,641,643, 647,653,659,661,673,677,683,691

How are 31 and 37 prime numbers between 30 and 40?

31 and 37 are integers between 30 and 40. They're the only ones in that range with only two factors.

What iis dividing by a number the same as multiplying by its addends by the number then adding the products?

It is pure nonsense.

Consider 5/6 (which is less than 1)

The addends of 6 are 2 and 4.

5*2 and 5*4 = 10 and 20 and their sum is 30 which is NOT less than 1!

What are the correct ways of calculating and expressing 1776 plus 223 entirely in Roman numerals showing detailed work?

The equivalent of 1776 and 223 converted into Roman numerals are MDCCLXXVI and CCXXIII respectively and under todays rules they officially add up to MCMXCIX which is supposed to be the equivalent of 1999.

But the ancient Romans would have probably calculated these numerals together on an abacus counting board as MDCCCCLXXXXVIIII which is the equivalent of 1999 and by placing I to both sides of these numerals systematically reduced them to IMM which is the equivalent of 2000-1 = 1999.

The real rules governing the original Roman numeral system were changed during the Middle Ages presumably to make the system more compatible friendly with the Hindu-Arabic numeral system that was gradually being introduced into Western Europe at the time.

QED by David Gambell

Is there an easy way to work out prime numbers up to 100?

The method know as The sieve of Eratosthenes is the easiest method. you simply write down all the numbers from 1 to 100 in rows of 10 and then you go through and you mark out all of the multiples of 2,3,4,5,6,7,8,9,10

How do you find the area when you already have the perimeter?

you dont keep the answer you just start from new. you do length times height times width:) i hope it helps:) thx, bella castaneta