An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

What word is pronounced the same if you take away four of its five letters?

Find the number of squares in the below-given picture.

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 I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?

What work can one never finish?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?