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?

A man dies of old age on his 25 birthday. How is this possible?

Replace the question mark with the correct number.

Jessica is telling her friends this story and asks them to guess if it’s the truth or a lie: “There was a man sitting in a house at night that had no lights on at all. There was no lamp, no candle, and no other source of light. Yet, he sat in the house and read his book happily.” Her friends say she’s lying, but Jessica corrects them and says she’s telling the truth. Jessica’s story is true—but how?

Which word does the below Plexor means ?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

What's the only room from which no one can enter or leave

Who has married many women but was never married?

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?