What English word has three consecutive double letters?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

What occurs twice in a week, once in a year but never in a day?

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?

What you cannot hold but it is yours?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?