The numbers 1-20 are on a dart board so there are twenty numbers.
The US Civics test is available in 20 different languages.
20 There can be two answers to this: I'll assume this is what you meant-> let's say you mean like pairing the numbers 1-5 with the numbers 6-9. 5*4=20
14=14 and 20=20 All numbers have different values, and the only number equal to itself is itself.
no
No.
No.
7 different numbers.35711131719
20
How many languages can you write......? The answer: a lot (depending on the above question)
15504 different sets of 5 numbers in each. This is a combination of 5 from 20: 20C5 = 20!/(20-5)!5! = 20x19x18x17x16/5x4x3x2x1 = 15504.
I answered this someplace else, but on a standard dartboard it's all the numbers 1-20 (so 20 total)