Jack was having a candle light dinner with his girlfriend. Suddenly a cold gush of wind entered through the open window and three of the ten candles were extinguished. Assuming that none of the other candles were extinguished.

How many candles are they left with in the end ?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Solve the puzzle by telling what does below picture means.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What month of the year has 28 days?