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

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

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

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

Count the number of balls in picture below:

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?