Multiple choice general knowledge If you divide 30 by 1/2 and then add 10 what do you have? 35 50 70 90 Reveal answer Fill a bubble to check yourself C Correct answer Explanation Dividing by 1/2 is the same as multiplying by 2. So 30 ÷ (1/2) = 30 × 2 = 60. Then adding 10 gives 70. Many people mistakenly calculate 30 ÷ 2 = 15 instead. This tests understanding of fraction division.