Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

When we see 2 but call 10?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Can you find the missing piece of the Porsche?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

How can you take 2 from 5 and leave 4?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?