John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Rearrange the letters in "new door" to make one word.

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

How can you take 2 from 5 and leave 4?

Complete the table series riddle by finding the number that can replace "??".