31.50 to the nearest tens place is 30
Chat with our AI personalities
It is already expressed as a whole number in the form of 3150
It is: 3150/3600 = 7/8 in its lowest terms
As a product of its prime factors: 2*3*3*5*5*7 = 3150 or as 2*32*52*7 = 3150
The idea is to subtract 10p minus 4p.
The one that is not a 10p is a 20p. The other coin is a 10p. The question/riddle does not say that neither coin is a 10p, only that one of them is not.