81 x 9 = 801. What must you do to make the this equation true?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Replace the question mark with the correct number in the below-given picture?

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.

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

How many triangles can you find in this given picture?

Spot 5 differences in two Christmas tree below:

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?