Prove that the below maths equation is true.

8 + 8 = 91

An apple seller is hosting a competition. He offers 1000 apples and 10 boxes to the people who pass by. The challenge is to put those 1000 apples in the 10 boxes in such a manner that if he asks for any amount of apples, the person can directly give him the boxes or a combination of boxes. If the person can do it, he promises to give a thousand apples for free.

If you happen to pass by the apple seller, will you be able to win a thousand apples?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

Using eight eights and addition only, can you make 1000?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

what one word does the below rebus identifies?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?