1.3 6 5 9 =5*6-(9-3)=24
2.2 3 4 6 = 4*6*(3-2)=24
3.10 7 8 8 =10*8-7*8=24
4.4 7 6 7 =4*6+(7-7)=24
5.8 4 8 4 =(8+8)+(4+4)=24
6.3 6 3 5 =5*6-(3+3)=24