What is the next number in the series?

15 29 56 108 208 ?

In the Mexico City area, there are two Houses H1 and H2. Both H1 and H2 have two children each.
In House H1, The boy plays for Mexico Youth academy and the other child plays baseball.
In House H2, The boy Plays soccer for his school in Mexico and they recently have a newborn.

Can you prove that the probability of House-H1 having a girl child is more than that of House-H2?

What occurs twice in a week, once in a year but never in a day?

I look at you, you look at me I raise my right, you raise your left. What am I?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

You have two jars of chocolates labelled as P and Q. If you move one chocolate from P to Q, the number of chocolates on B will become twice the number of chocolates in A. If you move one chocolate from Q to P, the number of chocolates in both the jars will become equal.

Can you find out how many chocolates are there in P and Q respectively?

Can you count the number of triangles in the picture below?

What does the below mathematical rebus mean?