Answer:

(i) {1, 2, 3, 4, 5, 6, 7}

(ii) {0, 1, 2, 3, 4}

(iii) {3, 6, 9, 12, 15}

(iv) {3, 6, 9, 12, 15, 18}

(v) {-1, 0, 1, 2, 3}

(vi) {-3, -2, -1, 0, 1, 2, 3}

(vii) {m, a, t, h, e, i, c, s}

(viii) {p, s, n}

(ix) {b, o, k}

(x) {s, c, h, o, l}

(xi) {11, 13, 15, 17, 19}.

(xii) {0, -1, -2, -3, ….}

(xiii) {0, 1, 4, 9, 16, ….}

(xiv) {a, e, i}

(xv) {m, d, r, s}

(xvi) {2, 3}

2. (i) {2, 3, 5, 7, 11, 13, 17, 19}

(ii) {12, 22, 32, 42} = {1, 4, 9, 16}

(iii) {2, 4, 6, 8}

(iv) {a, b, c, d, e, f, g, h}

(v) {b, a, s, k, e, t}

(vi) {January, February, March, April, May, June, July, August, September, October, November, December}

(vii) {Janesville, Jasper, Jeannette, Johnston}

(viii) {triangle, circle, square, pentagon}

(ix) {o, a}

(x) {0, 1, 4, 9}

3. (i) {3, 9, 15, 21}

(ii) {5, 15, 25, 35}

(iii) {18, 24, 3}

(iv) {Friday, Saturday, Sunday}

(v) {September, October, November, December}