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

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Why do we preferably have round manhole covers and not square ones?

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

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The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

Vin Diesel is pulling a theft and has planned to run away with all the cash kept in the safe. But the only way to open the safe is the 13 character password. He has a set of five clues given to him by a trustworthy source.

Exactly two of the below statements are false.
The password is contained within this sentence.
The password is not in this hint.
The password is within only one of these statements.
At least one of the above statements is a lie.

What can you catch but never throw?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

If six children and two dogs were under an umbrella, how come none of them got wet?