What is the word or phrase?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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

Find the number of squares in the below-given picture.

How can you make number one disappear by adding something to it?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

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?