Count the number of triangles in the below picture?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

How many times in a given day, minutes and hour clock comes in a straight line ?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you find out the missing number in the grid?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Four children having five rocks each were playing a game in which they had to throw the rock at a particular solid area in the water. Child 1- Succeeded in throwing three rocks at a solid area but one of the rocks sunk. Child 3 - His aim was so bad that all rocks got sunk. Child 4- He was awesome and none of the rocks got sunk. Child 2 - Was the winner but was struck by a rock in the head and died. Who killed Child 2?

These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?