Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

Which number should replace the question mark?

Count the number of triangles in the given picture.

I taste better than I can smell. Who am I?

Which part of London exists in France as well ?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

What is the next number in the series?

15 29 56 108 208 ?

Solve the counting riddle by identifying the number of triangles in the given picture.

I have thought of a number that is made up by using all the ten digits just once. Here are a few clues for you to guess my number:

First digits is divisible by 1.
First two digits are divisible by 2.
First three digits are divisible by 3.
First four digits are divisible by 4.
First five digits are divisible by 5.
First six digits are divisible by 6.
First seven digits are divisible by 7.
First eight digits are divisible by 8.
First nine digits are divisible by 9.
The number is divisible by 10.

Can you find out the number ?