Hexadecimal Bee Game
Converting hexadecimal, binary and decimal numbers.
Fewest Coins (Red)
Exchanging quarters, dimes, nickels, and pennies for the fewest coins possible at the lowest level of differentiation
加加看 : 添加分数 (Adding Fractions)
把2个涉及至10的同分母分数相加得到他们的和数。