Question : The third proportion of 1.8 and 9 is:

Option 1: 7.5

Option 2: 35

Option 3: 81

Option 4: 45

Question : Find two numbers such that their mean proportion is 16 and the third proportion is 1024.

Option 1: 4 and 32

Option 2: 4 and 64

Option 3: 8 and 64

Option 4: 8 and 32

Question : Find the third proportion of P and 12, when 8, P, 16, and 18 are in proportion.

Option 1: 16

Option 2: 8

Option 3: 18

Option 4: 12

Question : What are the coordinates of the centroid of a triangle whose vertices are A (2, 5), B (–4, 0), and C (5, 4)?

Option 1: (–1, 3)

Option 2: (1, 3)

Option 3: (1, –3)

Option 4: (–1, –3)

Question : The fourth proportion of numbers 8, 20 and 15 is:

Option 1: 37.5

Option 2: 10

Option 3: 10.6

Option 4: 200