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?

Can you tell a 3D object that has just two surfaces?

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?

What can you hold in your right hand, but never in your left hand?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

What does this say?

XLR8

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

What do you call a fish without an eye?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Shyla was sleeping in her apartment when suddenly a robber broke into her house. He asked her to stay quiet and started looting the cash and jewelry. Suddenly the landline phone started ringing. The robber pointed a gun at Shyla and asked her to pick up and talk without giving away the situation.

She picked up the phone and it happened to be her husband. She spoke, Is it an emergency darling? Do give me a call when your flight lands, I will prepare your favorite food that will help you relieve the stress. Then she hanged up.

10 minutes after, the police arrive at the scene and catch the robber. How did the police know about the robbery?