a < b never be possible in Euclid Division Lemma, because dividend(a) is always greater than divisor(b). explanation Euclid's division lemma , states that for any two positive integers a and b,we can find whole numbers
q and r such that a=bq+r, where r is greater than or equal to 0 but less than b.It can be used to find
the highest common factor of any two positive integers.
Let a>b.If r=o then b is the highest common factor of a and b and if r is not equal to zero find apply
euclids divison lemma to find new divisor b and remainder r.Continue the process untill the remainder
becomes zero.In that case the value of the divisor b is the highest common factor of a and b.