A. what comes next? 5, -15, 45, -135, …

1. 405, 1215, 3645

2. 675, -3375, 16875

3. 405, -1215, 3645

4. 405, -1215, -3645

b. what comes next? 1/3, 1, 5/3, 7/3, …

1. 3, 10/3, 4

2. 11/3, 13/3, 5

3. 3, 11/3, 13/3

4. 10/3, 4, 14/3

c. what comes next? 4, -1, -6, -11, …

1. -16, -21, -26

2. -16, 21, -26

3. -18, -21, -30

4. -18, 21, -30

mental cunning

explanation:

he is often referred to as a man of twists and turns

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.