In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

If an electric train is travelling south, then which way is the smoke going?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

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?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Find the missing number in the image below.

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Can you make a fire with just a single stick?