The Little ant seems to be always confused. Do you know why?

Solve this logical number series puzzle by replacing the question mark with the correct number
9090 = 4
1234 = 0
6055 = 2
9081 = 4
8888 = ?

Can you find the key in the picture below?

If eleven plus two equals one, what does nine plus five equal?

What does this mathematical rebus means ?

With the help clues provided in the image, can you find the 5 digit key?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

What is the largest number you can write with just 3 digits?

Why is it very easy to weigh a fish?

Can you make four (4) nines (9) equal 100?