Find the next number in the sequence

1, 2, 6, 21, 88, __?

What has a bottom at the top?

why number 8549176320 is one of a kind?

Can you place three balls such that the equation shown in the picture holds true?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

On a special event at the prison, 5 prisoners John, Jacob, Krist, Tang, and Dang given a chance to go to a sauna and can bring one thing with them.

Following are the things that the prisoners bring with them.
John: A soda
Jacob: Thermos
Krist: Book named "How to kill"
Tang: A Walkman
Dang: Harmonica

Since it is a Sauna, no one can see each other. After a while When the steam is switched, Tang was found dead and there was blood all around.
J Bond was called and he instantly come to know who can be the murderer. How?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

Find the next number in the following series:
6, 14, 26, 98, __?