How many words can a pen with half refill write?

What does below rebus means ?

They are three errirs in this question. Can you find them?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

How many triangles can you find in this given picture?

How many Watermelons are there in the below picture?

How many times can you subtract the number two from the number fifty?

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

Through your logical capabilities, can you make 7 an even?

Which holiday are we talking about?