If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Why Aeroplane windows are round?

Can you solve the below geography rebus by decoding the below rebus ?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

When we see 2 but call 10?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

It is always ahead of me yet I can never see it. What is it?