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

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.