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?

Keyboard words are not in alphabetical order, Why?

When can we add 2 to 11 and get 1 as the correct answer?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Find out the missing number in the picture attached:

Solve the counting riddle by identifying the number of triangles in the given picture.

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

what does the below rebus mean?