Replace the question mark with the correct number in the below-given picture?

Can you solve the maths in the below-given picture equation?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

What does this mean?

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What four weights can be used to balance from 1 to 30 pounds?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

Which letter of the alphabet has the most water?

How many letters are in the alphabet?

What kind of band never plays music?