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

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Find the missing number: 1, 2, 3, 10, 10, ?, 9,802

Find the number of squares in the below picture

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

Can you find the missing piece of the Porsche?

Can you solve the below tricky visual equation?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

Snow and Tyrion are two mad logicians who love betting. They placed 11 Candies at the table and designed a small betting game, in which both of them needed to eat Candies turn by turn with the following rules:

Rule 1: One needs to eat at least one candy.
Rule 2: One cannot eat more than 5 candies.

The one that eats the last candy will lose. Snow won the toss and needs to start. How many candies must Snow earn to make sure that he wins the bet?