250
50 divided by 1/5 is the same as saying 50 * 5/1 = 250 ----------------( that means there are 250 1/5's in 50 )
1
You will know because a prime number can only be divided by itself and one (1), if it can be divided by anything else then you will know that it is not a prime number.
Anything divided by 1 is itself.
1
Anything.
No. Zero is the exception to the rule, as you cannot divide anything by zero. For everything else though, dividing by itself does indeed give 1.
83.3333
0.25
1.3333
Anything divided by itself equals one.