Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Which five letter word can be added at the end of below word to form a
valid word?

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What does below pictogram mean?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

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

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?