Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Complete the table series riddle by finding the number that can replace "??".

A rain drop fell from one leaf to another leaf and lost 1/4th of its volume. It then fell to another leaf and lost 1/5th of the volume. It again fell on another leaf and lost 1/5th of the volume.



This process kept repeating till it fell on the last leaf losing 1/75th of its volume.



Can you calculate the total percentage of loss from the initial volume when the drop has fallen to the last leaf accurate up to two decimal places?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

what does this picture(rebus) riddle means ?

What is the next shape from answers A, B, C, and D figure?

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

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Find the hidden panda in the image below.