You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

What is the fastest way to double your money?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

What does the below mathematical rebus mean?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

What can go up a chimney down, but can’t go down a chimney up?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

When does a USA Potato change its nationality?