In mathematics, a binary relation on a set A is a collection of ordered pairs of elements of A .

Symmetry, pairs.

Two pairs.

Fruit flies have 4 pairs, and bananas have 11 pairs.

And the earth , how We spread it out , and set on it mountains , and grew in it all kinds of delightful pairs ?

And the earth , how We spread it out , and set on it mountains , and grew in it all kinds of delightful pairs ?

has two pairs of identical wings.

They have five pairs of prolegs.

Cows have 30 pairs of chromosomes.

And each sperm cell will have one from each of these pairs, one version from each of those pairs.

Provision is included for the acquisition of the following items of observation equipment four pairs of binoculars, day and night vision ( 30,000), four pairs of hand held binoculars ( 1,200), four pairs of 20 120 binoculars with tripod ( 43,200) and four pairs of night vision binoculars ( 40,000).

It's tens of thousands of pairs of shoes.

The number of walking legs is usually eight (four pairs), but species with five and six pairs exist.

And the earth We have spread it out , and set thereon mountains standing firm , and produced therein every kind of beautiful growth ( in pairs )

And the earth We have spread it out , and set thereon mountains standing firm , and produced therein every kind of beautiful growth ( in pairs )

Usually, three pairs of barbels are present.

We each have 23 pairs of chromosomes.

Human cells have 23 pairs of chromosomes.

Rhesus monkeys have 21 pairs of chromosomes.

One of those pairs determines your sex.

Chickens have 39 pairs.

That makes three pairs.

Me too... 3 pairs.

Just as quaternions can be defined as pairs of complex numbers, the octonions can be defined as pairs of quaternions.

Aimee Mullins and her 12 pairs of legs

The females usually have three pairs of nipples.

Wherein is every kind of fruit in pairs .

Wherein is every kind of fruit in pairs .

like pairs of people connected to each other.

Which of those pairs is not graphed below?

The figures show 2 pairs of normal lines.

There's no breeding pairs left.

We created you in pairs ,

And created you in pairs ?

and create you in pairs ?

And created you in pairs ?

and create you in pairs ?

We created you in pairs ,

There's no breeding pairs left.

So he pairs these up.

Now there are 10 pairs.

There are six different pairs.

I can look at this side and say, OK, adenine will pair with thymine, cytosine pairs with guanine, thymine pairs with adenine, and guanine pairs with cytosine.

In 2010, there were 279 in Spain and 3 pairs in Portugal, which is an increase of 16 pairs since 2009.

The first state represents all pairs which begin with 'A', the second, all pairs that begin with 'B', and the third state, all pairs that begin with 'C'.