In British coinage 20p coins are quite common and will normally only be worth their face value. The only notable exception is the 'dateless' 2008 mule errors which are worth significantly more than their face value. (around £30-£90)
The 2008 mule 20p is more valuable than other 20p coins because it is uncommon and desirable to collectors. If the United Kingdom switched to the Euro this would not change the value of the coin as a collectors item, in fact it would probably make the coin slightly more desirable.
13 of 20p = 260p.
99 add 20p = 119
7
20p - 8p = 12p
20p/£2 = 20p/200p = 20/200 = 1/10
1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
60 ÷ 3 = 20p
It is worth 20p.
The answer is 100/(20p) = 5/p
Since 5p is a factor of 20p, it is automatically the GCF.
30p = 20p + 5p + 5p 40p = 20p + 10p + 10p