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www.reference.com/world-view/factor-pairs-72-a2cc51e8c44c63ce

The factor pairs of 72 are 1 x 72, 2 x 36, 3 x 24, 4 x 18, 6 x 12 and 8 x 9. The product of each of these number pairs is 72.

www.reference.com/article/can-pair-jordans-b08b53822039475d

The best chance one may have of finding a free pair of Jordans may be coming across ones that someone has thrown away or lost. Another way to get a free pair of Jordans is through free contests and promotions.

www.reference.com/world-view/much-pair-jeans-weigh-fbc0c25f081a33e6

The weight of a pair of jeans varies, but jeans can be grouped into three weight categories. Lightweight jeans are less than 12 ounces, mid-weight jeans are from 12 to 16 ounces and heavyweight jeans are above 16 ounces.

www.reference.com/article/muscles-arranged-pairs-14a0984621ae00f0

Muscles are arranged in pairs on the skeleton in order to allow extension and contraction of body parts. According to the BBC, skeletal muscles can only pull in one direction.

www.reference.com/article/examples-synonym-pairs-eac03d989f434f9a

"Beautiful and attractive," "honest and honorable," and "lazy and idle" are several examples of synonym pairs. Synonym pairs, which are two words that mean roughly the same thing, can be composed of words from any of the eight parts of speech as long as the two words are from the same part of speech

www.reference.com/world-view/linear-pair-ca95bac022cd3959

A linear pair is a geometric term for two intersecting lines with a 180-degree angle. It is also known as a conjecture, or hypothesis, of linear pairs. Linear pairs require unshared sides of the angles to create rays on opposite sides.

www.reference.com/article/au-pair-4363dc2bcde63635

An au pair is a young person who travels abroad to stay with a host family and carry out duties such as looking after children and doing housework. The phrase is of French origin and means "by mutual agreement."

www.reference.com/science/complementary-base-pairing-868642d6c95f8b00

Complementary base pairing refers to the structural pairing of nucleotide bases in deoxyribonucleic acid, which is commonly known as DNA. DNA is made up of four nucleotide bases, each of which pairs with only one of the other bases.

www.reference.com/article/shape-two-pairs-parallel-sides-f58fb642e4c2b3b1

There are four variations of quadrilaterals that have two pairs of parallel sides: rhombuses, parallelograms, squares and rectangles. They are each differentiated by their relative side lengths and angles.

www.reference.com/article/many-pairs-chromosomes-humans-b4c33bb0c9476df5

Humans typically have 23 pairs of chromosomes, resulting in a total of 46 chromosomes. These chromosomes determine individual genetics traits as well as a person's gender.