Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

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

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Where do you go to learn how to make ice cream?

What does an Island and the letter T have in common?

A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?