the second pair of ribs

pair of sacs is seminal vesicles

I'm not sure exactly what you mean by "pair of no.12"

There is no factor pair of 12 that has a GCF of 6.

There is a pair of factors of 12 (6 and 12) that have a GCF of 6.

There is a pair of numbers that add up to 12 (6 and 6) that have a GCF of 6.

6 and any multiple of 6 have a GCF of 6.

Any multiples of 6 that differ by 6 have a GCF of 6.

The word 'pair' is a noun and a verb. The noun pair is a word for two things that match or go together; the verb to match is to join or connect to form a pair. Examples:

Noun: You guys are quite a pair.

Verb: We pair them by matching the colors.

The word 'pare' is a verb; a word for trimming by use of a knife or clippers, to reduce the size or amount of something. Examples:

You should pare the apple because Junior can choke on the skins.

We have to pare the budget by twenty per cent.

pair of kings season 2 episode 4 is dinner with the squonks it came out on july 11,2011