Question : What is the difference between the average of the first 148 even positive numbers and the average of the first 129 odd positive numbers?

Option 1: 21

Option 2: 20

Option 3: 23

Option 4: 19

Question : The arithmetic mean of the following data is _________.
23, 17, 20, 19, 21

Option 1: 20

Option 2: 19

Option 3: 23

Option 4: 21

Question : The sum of two positive integers is 80 and the difference between them is 20. What is the difference between the squares of those numbers?

Option 1: 1400

Option 2: 1600

Option 3: 1800

Option 4: 2000

Question : The average of seven consecutive numbers is 20. The largest of these numbers is:

Option 1: 24

Option 2: 23

Option 3: 22

Option 4: 20

Question : The difference between the cubes of two given natural numbers is 6272, while the positive difference between the two given numbers is 8. What is the product of the two given numbers?

Option 1: 160

Option 2: 240

Option 3: 200

Option 4: 320

Question : The average of three consecutive even numbers is A. If the next five even numbers are added, what is the average of these eight numbers?

Option 1: A + 3

Option 2: A + 4

Option 3: A + 5

Option 4: A + 7