Write the first 10 multiples of the following: 12, 20, 50, 15, 6, 25, 8, 9, 7, 13

$$12 \times 1 = 12$$ $$12 \times 2 = 24$$ $$12 \times 3 = 36$$ $$12 \times 4 = 48$$ $$12 \times 5 = 60$$ $$12 \times 6 = 72$$ $$12 \times 7 = 84$$ $$12 \times 8 = 96$$ $$12 \times 9 = 108$$ $$12 \times 10 = 120$$

The first 10 multiples of 12 are $12, 24, 36, 48, 60, 72, 84, 96, 108, 120$.

$$\boxed{12, 24, 36, 48, 60, 72, 84, 96, 108, 120}$$

$$50 \times 1 = 50$$ $$50 \times 2 = 100$$ $$50 \times 3 = 150$$ $$50 \times 4 = 200$$ $$50 \times 5 = 250$$ $$50 \times 6 = 300$$ $$50 \times 7 = 350$$ $$50 \times 8 = 400$$ $$50 \times 9 = 450$$ $$50 \times 10 = 500$$

The first 10 multiples of 50 are $50, 100, 150, 200, 250, 300, 350, 400, 450, 500$.

$$\boxed{50, 100, 150, 200, 250, 300, 350, 400, 450, 500}$$

$$6 \times 1 = 6$$ $$6 \times 2 = 12$$ $$6 \times 3 = 18$$ $$6 \times 4 = 24$$ $$6 \times 5 = 30$$ $$6 \times 6 = 36$$ $$6 \times 7 = 42$$ $$6 \times 8 = 48$$ $$6 \times 9 = 54$$ $$6 \times 10 = 60$$

The first 10 multiples of 6 are $6, 12, 18, 24, 30, 36, 42, 48, 54, 60$.

$$\boxed{6, 12, 18, 24, 30, 36, 42, 48, 54, 60}$$

$$8 \times 1 = 8$$ $$8 \times 2 = 16$$ $$8 \times 3 = 24$$ $$8 \times 4 = 32$$ $$8 \times 5 = 40$$ $$8 \times 6 = 48$$ $$8 \times 7 = 56$$ $$8 \times 8 = 64$$ $$8 \times 9 = 72$$ $$8 \times 10 = 80$$

The first 10 multiples of 8 are $8, 16, 24, 32, 40, 48, 56, 64, 72, 80$.

$$\boxed{8, 16, 24, 32, 40, 48, 56, 64, 72, 80}$$

$$7 \times 1 = 7$$ $$7 \times 2 = 14$$ $$7 \times 3 = 21$$ $$7 \times 4 = 28$$ $$7 \times 5 = 35$$ $$7 \times 6 = 42$$ $$7 \times 7 = 49$$ $$7 \times 8 = 56$$ $$7 \times 9 = 63$$ $$7 \times 10 = 70$$

The first 10 multiples of 7 are $7, 14, 21, 28, 35, 42, 49, 56, 63, 70$.

$$\boxed{7, 14, 21, 28, 35, 42, 49, 56, 63, 70}$$

$$20 \times 1 = 20$$ $$20 \times 2 = 40$$ $$20 \times 3 = 60$$ $$20 \times 4 = 80$$ $$20 \times 5 = 100$$ $$20 \times 6 = 120$$ $$20 \times 7 = 140$$ $$20 \times 8 = 160$$ $$20 \times 9 = 180$$ $$20 \times 10 = 200$$

The first 10 multiples of 20 are $20, 40, 60, 80, 100, 120, 140, 160, 180, 200$.

$$\boxed{20, 40, 60, 80, 100, 120, 140, 160, 180, 200}$$

$$15 \times 1 = 15$$ $$15 \times 2 = 30$$ $$15 \times 3 = 45$$ $$15 \times 4 = 60$$ $$15 \times 5 = 75$$ $$15 \times 6 = 90$$ $$15 \times 7 = 105$$ $$15 \times 8 = 120$$ $$15 \times 9 = 135$$ $$15 \times 10 = 150$$

The first 10 multiples of 15 are $15, 30, 45, 60, 75, 90, 105, 120, 135, 150$.

$$\boxed{15, 30, 45, 60, 75, 90, 105, 120, 135, 150}$$

$$25 \times 1 = 25$$ $$25 \times 2 = 50$$ $$25 \times 3 = 75$$ $$25 \times 4 = 100$$ $$25 \times 5 = 125$$ $$25 \times 6 = 150$$ $$25 \times 7 = 175$$ $$25 \times 8 = 200$$ $$25 \times 9 = 225$$ $$25 \times 10 = 250$$

The first 10 multiples of 25 are $25, 50, 75, 100, 125, 150, 175, 200, 225, 250$.

$$\boxed{25, 50, 75, 100, 125, 150, 175, 200, 225, 250}$$

$$9 \times 1 = 9$$ $$9 \times 2 = 18$$ $$9 \times 3 = 27$$ $$9 \times 4 = 36$$ $$9 \times 5 = 45$$ $$9 \times 6 = 54$$ $$9 \times 7 = 63$$ $$9 \times 8 = 72$$ $$9 \times 9 = 81$$ $$9 \times 10 = 90$$

The first 10 multiples of 9 are $9, 18, 27, 36, 45, 54, 63, 72, 81, 90$.

$$\boxed{9, 18, 27, 36, 45, 54, 63, 72, 81, 90}$$

j) Multiples of 13:

$$13 \times 1 = 13$$ $$13 \times 2 = 26$$ $$13 \times 3 = 39$$ $$13 \times 4 = 52$$ $$13 \times 5 = 65$$ $$13 \times 6 = 78$$ $$13 \times 7 = 91$$ $$13 \times 8 = 104$$ $$13 \times 9 = 117$$ $$13 \times 10 = 130$$

The first 10 multiples of 13 are $13, 26, 39, 52, 65, 78, 91, 104, 117, 130$.

$$\boxed{13, 26, 39, 52, 65, 78, 91, 104, 117, 130}$$