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

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

Next Number in the Series,

5, 16, 49, 104, ?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

Can you count the number of children in the picture below

Can you replace the question mark with the correct number in the below table sequence?

Solve below rebus puzzle?

Why is the Hole below a Lock?

Can you solve the below tricky visual equation?

What does below pictogram mean?