Exercises A. Directions: Before each number, draw a (✓) if the set below form a sequence and (X) if not.
1)1, 2, 3, 4, 5
2)c, f, i, l,o, r
3)– 2, 5, - 8, 11, - 14
4)2, 6, 18, 54, 162
5)R, O, Y, G, B, I
6)A, E, I, O, U
7)10, 20, 50, 100, 500, 1000
8)1, 10, 100, 1000, 10000, 100000
9)x, 3x, 9x, 27x, 81x
10)Unicycle, Bicycle, Tricycle,
11) 32, 25, 18, 12, 10, 5
12) S, T, u, c, K, a
13) 1,4, 9, 16, 25, 36, 49
14) T, Q, P, H, H, O, N, D
15) B, 5, E, 2, H, - 1, K, - 4
16) 1, 3, 9, 27, 81, 243
17) x2, x3, x4, x5, x6
18) 1/2 ,1/4 , 1/6 , 1/8 , 1/10
19) 4, 3, 2, 1
20) Ace, Jack, Duke, Queen, Heart​