What is the next number in the series?

15 29 56 108 208 ?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Can you count the number of squares in the figure below?

Can you place six X (crosses) in below board without making three in a row in any way ?

What part of the chicken has the most feathers?

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

What has one eye, but can’t see?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

Name a key which is hardest to turn.