Sunday maths is back

Can you solve these simple equations or are they tricky?

Q1: 1 = 3 / 2 = 9 / 3 = 27 / 4 = ?

Q2: 9 - 3 ÷ 1/3 (one third) + 1 = ?

Q3: 1.92 ÷ 3 = ?

Q4: 12 + 5 ÷ 1/5 (one fifth) = ?

have fun