**Number ****Lines** is a classic online video game came can be accessed from your desktop, tablet, ipad or even from your smart phones.

There is absolutely no age limit for this game. This game has numbered balls of varying colors and the gamer has to destroy the numbered balls whose sum comes to ten. A single ball can be used to destroy balls with same numbers. For instance if you are shooting a ball numbered 4, then you can aim at the ball which is numbered six. This will add to number ten and the balls will burst. If your ball is numbered 8 then you just need to aim at a ball numbered two. Consequently Number Lines is very useful for parents to enter their toddlers into the world of numbers and math. This fun game is quite additive and can be a great way of relaxation for elders as well. Have fun playing Number Lines.

In basic mathematics, a **number line** is a picture of a graduated straight line that serves as abstraction for real numbers, denoted by {\displaystyle \mathbb {R} }. Every point of a number line is assumed to correspond to a real number, and every real number to a point.^{}

The integers are often shown as specially-marked points evenly spaced on the line. Although this image only shows the integers from −9 to 9, the line includes all real numbers, continuing forever in each direction, and also numbers not marked that are between the integers. It is often used as an aid in teaching simple addition and subtraction, especially involving negative numbers.

In advanced mathematics, the expressions real number line, or real line are typically used to indicate the above-mentioned concept that every point on a straight line corresponds to a single real number, and vice versa