The RNG ensures that every spin is independent and unpredictable by continuously producing numbers even when the machine is not in use. The RNG chooses a set of numbers that match the symbols on the screen when a player pulonline patti gamels the lever or presses the spin button, deciding whether the player wins or loses. Knowing Bet Sizes and Paylines. Paylines and bet sizes are concepts that must be understood in order to comprehend how slot machines operate. The lines that must be crossed by winning combinations in order for a player to be paid are known as paylines. While modern video slots can have multiple paylines—up to 100 at times—classic slots usually only have one.