Question

2.2
Practice A
In Exercises 1 and 2, describe the pattern. Then write or draw the next two
numbers or letters.
1. 2, 5, 11, 23, 47, ...
2. A, Z, B, Y, C, ...
Can I get help with 1 and/or 2

Answer 1

Answer:

2, 5, 11, 23, 47, 95, 191

A, Z, B, Y, C, X, D, W, E, V

Step-by-step explanation:

1. 2, 5, 11, 23, 47, ...95, 191

5 - 2 = 3

12 - 5 = 6

23 - 11 = 12

47 - 23 = 24

Next

(24 × 2) + 47

= 48 + 47

= 95

Next

(48 × 2) + 95

96 + 95

= 191

Next

(96×2) + 191

192 + 191

= 383

The pattern follows (difference ×2) + previous number

That is,

(5 - 2) * 2 + 5

3*2 + 5

6 + 5

= 11

2, 5, 11, 23, 47, 95, 191

2. A, Z, B, Y, C, ...

First letter , 26th letter, 2nd letter, 25th letter, 3rd letter, 24th letter, 4th letter, 23rd letter, 5th letter, 22nd letter

A, Z, B, Y, C, X, D, W, E, V