Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Can you find the 09 errors in the picture below?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Which is heavier: a ton of bricks or a ton of feathers?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

A man is sitting in a bar when a rich man sits next to him. He turns to the rich man and says, “Did you know I know almost every song that has ever existed?”

The rich man laughs. The man then says, “I bet you all the money you have in your wallet that I can sing a genuine song with a lady’s name of your choice in it. The rich man laughs again and says, “OK, how about my daughter’s name, Jamie Armstrong-Miller?” Minutes later, the man collects his cash and the rich man goes home cashless. What song did the man sing?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

A sundial has the fewest moving parts of any timepiece. Which has the most?

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