Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

What work can one never finish?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Next Number in the Series,

5, 16, 49, 104, ?

What does does this rebus picture means ?