Q: How many integers between 13 and 19 inclusive have an even number of prime factors?

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A rectangular number is a number which is the product of two consecutive integers.

If you have drawn a number line counting in whole numbers, the integers are those whole number points. Any decimal numbers in between are not integers.

Among positive integers, 6

not necessarily... An integer is a rational number, but so is any real number between consecutive integers.

Fractions are integers divided by integers. Percentages are the number of hundredths.

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Every number from 100 to 999 inclusive !

60

There are 44 positive integers less than 2,010 that have an odd number of factors.

Infinitely many, since every positive number is a square of some other number. However, there are 21 perfect squares (SQUARES OF INTEGERS). From 112 to 312, inclusive.

A rectangular number is a number which is the product of two consecutive integers.

It will be even.

The sum of the integers 1 to 99 is 4950. An easy way to figure this out is using the equation N*(N+1)/2 where N is the largest number in the set.

There are no negative integers between positive ones on the number line.

-89

The factors of a number comprises all positive integers which go into it evenly.

No, only the integers with more than two factors.

Factors of 101 are 1 and 101. So, it is a prime number.