Question 1

 (a) $$20, 23, 26$$ (b) $$71, 79, 87$$ (c) $$26, 21, 16$$ (d) $$53, 59, 65$$ (e) $$-27, -31, -35$$ (f) $$87, 100, 113$$ (g) $$41, 46, 51$$ (h) $$-26, -33, -40$$ (i) $$82, 95, 108$$

Question 2

 (a) $$4$$ (b) $$58$$ (c) $$11$$ (d) $$55$$ (e) $$63$$ (f) $$133$$ (g) $$1$$ (h) $$36$$ (i) $$55$$

Question 3

 (a) $$8, 14, 20, 26$$ (b) $$1, 3, 5, 7$$ (c) $$25, 28, 31, 34$$ (d) $$1, 6, 11, 16$$ (e) $$16, 23, 30, 37$$ (f) $$-9, -12, -15, -18$$ (g) $$7, 11, 15, 19$$ (h) $$15, 6, -3, -12$$ (i) $$6, 18, 30, 42$$ (j) $$3, 11, 19, 27$$ (k) $$27, 12, -3, -18$$ (l) $$18, 31, 44, 57$$

Question 4

 (a) $$9$$ (b) $$6$$ (c) $$12$$ (d) $$5$$ (e) $$8$$ (f) $$7$$ (g) $$10$$ (h) $$5$$ (i) $$11$$ (j) $$8$$ (k) $$7$$ (l) $$6$$

Question 5

 (a) $$2n + 3$$ (b) $$8n - 7$$ (c) $$-3n - 8$$ (d) $$4n - 3$$ (e) $$5n + 7$$ (f) $$-9n + 45$$ (g) $$6n - 11$$ (h) $$3n - 7$$ (i) $$7n + 3$$ (j) $$-6n + 19$$ (k) $$4n - 6$$ (l) $$18n - 37$$

Question 6

 (a) $$151, 196, 247$$ (b) $$66, 83, 102$$ (c) $$123, 158, 197$$ (d) $$75, 8, 101, 131$$ (e) $$121, 156, 195$$ (f) $$147, 183, 223$$ (g) $$101, 131, 165$$ (h) $$94, 116, 140$$ (i) $$128, 169, 216$$

Question 7

 (a) $$44$$ (b) $$53$$ (c) $$18$$ (d) $$-5$$ (e) $$20$$ (f) $$43$$ (g) $$-7$$ (h) $$41$$ (i) $$48$$

Question 8

 (a) $$9, 12, 17, 24$$ (b) $$-3, 3, 13, 27$$ (c) $$2, 12, 21, 32$$ (d) $$3, 16, 39, 72$$ (e) $$-2, 4, 12, 22$$ (f) $$5, 20, 37, 56$$ (g) $$17, 26, 39, 56$$ (h) $$-2, -3, 0, 7$$ (i) $$7, 22, 45, 76$$ (j) $$-2, -4, -4, -2$$ (k) $$-2, 11, 30, 55$$ (l) $$15, 24, 45, 78$$

Question 9

 (a) $$n^2$$ (b) $$n^2 + 3$$ (c) $$2n^2$$ (d) $$n^2 - 2$$ (e) $$3n^2$$ (f) $$2n^2 + 3$$ (g) $$4n^2 + 2n$$ (h) $$2n^2 - 6n + 7$$ (i) $$n^2 + 8n - 4$$ (j) $$5n^2 + 4n - 3$$ (k) $$4n^2 - 2n$$ (l) $$6n^2 + 5n + 12$$