There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

Can you find the thief by just looking at the picture below?

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

Solve the equation in the image by looking at the pattern closely.