There are 2 sand hourglasses. The small one can measure 5 hours and the large one can measure 7 hours. How can we measure 16 hours with 2 sand hourglasses running together ?
I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?
The first person saw the bridge step on it and crossed, the second person saw the bridge did not step on it but crossed, the third person did not see the bridge did not step on it but crossed. Who are these people?
Which alphabet letter is a question?
How high do you have to count before you use the letter “a†in the English spelling of the whole number?
I have a clock(12-hour format) and both the needles of the clock overlap at 12:00. After how much time, they will overlap again?
You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up. In how many different ways you can climb 10 stairs?
In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat. Can this even be possible?
Solve the mathematical equation in the picture below.
As a whole I am both safe and secure. Behead me and I become a place of meeting. Behead me again and I am the partner of ready. Restore me, and I become the domain of beasts. What am I?
If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?
In Canada, a mathematical puzzle must be solved in order to win the lottery to classify it as a “game of skill” not gambling.