Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

There are forty elephants and they have forty-fore heads. How can this be possible?

Can you identify if it's a murder or a suicide ?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

What's the best place to go shopping in the ocean?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?