Can you find out the total number of triangles in the given figure?

A man dies of old age on his 25 birthday. How is this possible?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

A bomb exploded in a room full of married couples and no one died. How?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?