I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

How can you take 2 from 5 and leave 4?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Count the Triangle in the figure given below:

I cannot talk, but I always reply when spoken to. What am I?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

If 21x = 79x, what is the value of x?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?