Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

What does this simple rebus mean?

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

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?

What has hands, but can’t clap?

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