The factor pairs of 21 are:1, 213, 7Therefore, the number 21 has two pairs of positive integer factors.
There are infinitely many pairs of numbers including many pairs of positive integers. An easy pair to remember is 1 and 675.
3 pairs of whole numbers add up to 7: 1 +6, 2+5, 3+4 (0+7 also equals 7, but zero is not a whole number)
five pairs
Four unique pairs.
5 of them.
The factor pairs of 21 are:1, 213, 7Therefore, the number 21 has two pairs of positive integer factors.
An infinite number.
There are infinitely many pairs of numbers including many pairs of positive integers. An easy pair to remember is 1 and 675.
3 pairs of whole numbers add up to 7: 1 +6, 2+5, 3+4 (0+7 also equals 7, but zero is not a whole number)
The numbers are the same as positive numbers, just the signs change. Write out the factor pairs as if the number were positive, but make one of the numbers positive and one negative. Now write the same pairs over again and reverse the signs. Negative numbers have twice as many factor pairs as positive numbers do.
five pairs
it is a whole number, it has two digits, it is not a prime number, it is positive, 4 months have this many days
Four unique pairs.
an infinite number. integers are all whole numbers, negative numbers and positive numbers.
Six.
An infinite number of times. If you restrict yourself to whole numbers, 500 has 6 factor pairs.