Riddle of 24(Free Math Game)

It's a simple yet challenging mathematical game: With the 4 digits of 1-9(or A-K),use the 4 basic arithmetic operations and connection to form a formula which result as 24:

For example,given the 4 random digits - 3,8,5,4, The formula can be: 3x8x(5-4), 4x(8+3-5), (5-3)x(4+8) or 58-34

There are 2 play modes for the game of point 24.

1.Time Limited: Challenge your brain speed.

2.Pass Through: How far can you go?

There are 2 play rules for each play mode:

1. 1-9 digits - Simple rule

2. A-K(1-13 numbers) - Poker card rule

Note:You can always use the hint function 3 times every round,which can help you to get the 24 for some groups with 5 stars difficulty.