What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

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?

Count the number of triangles in the given picture.

Can you find the company name in the pictogram below?

Before Mount Everest was discovered, what was the highest mountain in the world?

What does this mathematical rebus means ?

What does this rebus riddle mean?

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.