A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

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

Which is the rope you never skip with?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Find the missing number in the image below.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?