What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

why number 8549176320 is one of a kind?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Different lights make me strange by changing me into different sizes. What am I?

Can you solve the below rebus?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

When we see 2 but call 10?

What can you see in the middle of March and April that you can never see in any other month?

Be active and find the killer in the picture Riddle below.