In a building, 60% of the apartments are occupied. If there are 100 apartments total, how many are empty?
Category: Math · Difficulty: hard
Hint: Calculate the number of occupied apartments first.
Answer
40
Explanation
60% of 100 is 60. Hence, 100 - 60 = 40 apartments are empty.
This is a hard math riddle — a tricky one that takes a little thought. The answer is 40.
More Math riddles
- I am thinking of two numbers. Their difference is four, and their product is twenty-one. What are the numbers?
- I am smaller than fifty. When you subtract me from twice myself, the result is thirty. What number am I?
- I establish the foundation for reasoning, yet I am not always visible, my principles guide thought. What am I?
- I’m not a bank, but I can grow. What am I that holds value in a row?
- Count my letters and you will see, I have six without any decree. What am I?
- I am odd and proud, appearing with glee, take me out of ten and you will see. What am I?
- I have a value that can grow, but you cannot see me. You can gain or lose me, yet I remain intangible. What…
- I am everywhere you look, yet I can't be held. I help you count but lack physicality. What am I?