Multiple choice general knowledge Divide 30 by 1/2 and add 10. What is the answer? 25 70 35 40 Reveal answer Fill a bubble to check yourself B Correct answer Explanation Dividing 30 by 1/2 gives 60 (because 30 ÷ 1/2 = 30 × 2 = 60), and adding 10 gives 70. The common mistake is to think dividing by 1/2 means halving, when it actually means multiplying by 2.