Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

What is red and smells like blue paint?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

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

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?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Take away the whole and some still remain. What is it?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?