2018 · Q34
Suppose a, b, c, d and e are five consecutive odd numbers in ascending order. Consider the following statements:
- 1Their average is (a + 4).
- 2Their average is (b + 2).
- 3Their average is (e − 4).
Which of the statements given above is/are correct?
general-mental-abilityquantitative-aptitude
- A1 only
- B2 and 3 only
- C1 and 3 only
- D1, 2 and 3
Explanation
Five consecutive odd numbers in ascending order are a, a+2, a+4, a+6, a+8, and their average is the middle term, a+4. So statement 1 (average = a+4) is true; since b = a+2, the average is also b+2 (statement 2 true); since e = a+8, the average is e−4 (statement 3 true). All three statements are correct.