The cream is heavier than Milk. True or False?

Replace the question mark with the number below given a simple math problem.

Why do we preferably have round manhole covers and not square ones?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.

What is the original number on number plate?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

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

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?