The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

What occurs twice in a week, once in a year but never in a day?

what does this picture(rebus) riddle means ?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

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

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?