What English word has three consecutive double letters?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

Spot the cat in the picture below

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

How can I get the answer 24 by only using the numbers 8,8,3,3?

You can use the main signs add, subtract multiply and divide.

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Find the next number in the series.
1 10 24 43 67 ?