Problem / game
First name
Rosie
Country
Age
10
Every time you take a multiple of 5 and double it, it will always become a multiple of 10. Then, if you see how many tens the answer has got, it has just been divided by ten again. So, if you had 25 and you doubled it, it would equal 50. Then, if you see how many tens 50 has got, it has 5 and that would happen with all the other ones. This will always happen with every single multiple of 5.