What goes up but never comes down?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Prove that the below maths equation is true.

8 + 8 = 91

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Which part of London exists in France as well ?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

What is both possible and impossible at the same time?