You can see that when using two dice, number 7 can be rolled in 6 different ways. 6+1, 5+2, 4+3, 3+4, 2+5 and 1+6.
You can see that when using two dice, number 7 can be rolled in 6 different ways. 6+1, 5+2, 4+3, 3+4, 2+5 and 1+6. Numbers 2 and 12 on the other hand have the least possible combinations (only 1 for each). This is because you can use all of the sides on both dices to throw a 7, but you can only use 1 side to throw a 2.