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

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

What has a bottom at the top?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Can you start the fire using two pieces of wood?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

Solve this tricky question. You are trapped in a forest. With you, you have a gun preloaded with two bullets in it. In front of you, there is a tiger, a leopard and a jaguar.

How do you survive?

Which is faster, Heat or Cold ? Explain.

Which letter of the alphabet has the most water?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?