A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

I am quite hot but become too cold if you remove the first two letters. What am I?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

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

What does below rebus means ?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

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

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

All of you like to eat me. I am a five-lettered word. Remove the first two and I turn into an infamous animal. Remove just the first and I become a heinous crime. Remove the first and the last and you can groove on me.

Can you guess who am I?