They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

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?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

What number do you get when you multiply all of the numbers on a telephone's number pad?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle