Which of the following gives the quotient as natural number?
0 ÷ 8
1 ÷ 2
18 ÷ 1
10 ÷ 20
0 ÷ 8 = 0 (not a natural number)
18 ÷ 1 = 18 (natural number)
1 ÷ 2 = 1/2 (not a natural number)
10 ÷ 20 = 1/2 (not a natural number)
So, option 18 ÷ 1 is correct.