Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

How many times in a given day, minutes and hour clock comes in a straight line ?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

Can you find a five letter word that is left with only two letters if one is removed?