Averages questions and answers

20 questions in 2 online tests, each with its answer and a worked solution.

Start Test 1

Averages: key points

The average (arithmetic mean) of a set of values is their sum divided by the number of values.

  • Average = sum of the values / number of values.
  • Average of the first n natural numbers = (n + 1) / 2.
  • Average of the first n even numbers = n + 1; of the first n odd numbers = n.
  • When a value is added or removed, compare the totals before and after.

How to practise Averages

Start with the key points, then take one Averages test without rushing. Review every explanation, note the steps you missed and repeat the topic against the clock. APTITUDE TESTER has 20 questions in 2 tests for this topic.

  • Read the method before attempting a timed test.
  • Record mistakes by type: concept, calculation or time management.
  • Return to the hardest questions after a day and try them again.

Continue with another Quantitative topic when your accuracy is steady.

Averages online tests

Sample Averages questions

  1. 1. Find the average of 72, 90, 81, 40, 17.
    1. 62
    2. 60
    3. 66
    4. 64

    Reference: q-cba8c98e-40 · Report this question

    Show answer and solution

    Answer: B. 60

    Sum = 300. Average = 300 / 5 = 60.
  2. 2. What is the average of the first 32 odd numbers?
    1. 31
    2. 32
    3. 33
    4. 29

    Reference: q-ffe6d692-49 · Report this question

    Show answer and solution

    Answer: B. 32

    The average of the first n odd numbers is n = 32.
  3. 3. The average weight of 14 students is 55 kg. When a new student joins, the average becomes 56 kg. What is the weight of the new student?
    1. 70 kg
    2. 73 kg
    3. 76 kg
    4. 69 kg

    Reference: q-f658b1dc-136 · Report this question

    Show answer and solution

    Answer: A. 70 kg

    Total after joining = 15 × 56 = 840. Total before = 14 × 55 = 770. New student = 70 kg.

See all the questions of Test 1

Averages: questions people ask

How many Averages questions are there?

There are 20 Averages questions in 2 tests. Each test has its own page that lists the questions with their answers and solutions.

How long does a Averages test take?

A test of 10 questions has a time limit of 15 minutes, which is 90 seconds a question.

Is there negative marking?

Rules vary by set. The rules screen shows the time limit, marks, any wrong-answer penalty and calculator permission before you begin. Feedback mode has no time limit or negative marking.

Can I practise Averages without a time limit?

Yes. Choose practice mode: there is no clock, and the answer and solution appear as soon as you select an option.