Question

with out actual division 21/160 is teminating or not

Answer 1

Yes bcoz 160 is 5*2*2*2*2*2 where all multiples are either 5 or 2

Answer 2

just find the LCm of 160and if it is having 2&5 as its factor then it's a terminating number notice only 2 or 5 should be the factors