Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

What always comes into a house through the keyhole?

How many triangles can you count in the figure given?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

Can you spot the man between the coffee bean in the picture below ?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

How do you go from 98 to 720 using just one letter?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?