CA Foundation · Quantitative Aptitude · Sequence and Series
What is the arithmetic mean between 18 and 46?
The arithmetic mean between 18 and 46 is 32. It is found by adding the two numbers to get 64 and dividing by 2. This value sits exactly midway, so 18, 32, 46 form an arithmetic progression with common difference 14.
- A28
- B32Correct
- C34
- D64
Explanation
The single arithmetic mean between a and b is (a + b)/2 = (18 + 46)/2 = 64/2 = 32. The option 64 is the sum, where the division by 2 was forgotten.
Did you get it right without looking?
One question tells you little. A timed set on Sequence and Series shows your real accuracy, how long you take and where you lose marks.
More Sequence and Series questions
- The nth term of a sequence is given by Tn = 3n − 2 for odd n and Tn = n² for even n. What is the sum of the first six terms?
- A textile firm's production capacity in successive months forms a geometric sequence. If the production in month 2 is 1,200 units and month …
- A company's annual sales grow so that each year's increase is 10% of the previous year's sales. If sales in the first year are ₹2,00,000, wh…
- For two distinct positive numbers a and b, the AM, GM and HM are A, G and H respectively. If A = 25 and H = 9, what is the value of G, and w…
- Mehta Traders buys a machine whose value falls each year. A donation fund pays ₹6,000 in the first year, and each later year's payment is 3/…
- The population of a town increases by 10% every year. If the present population is 50,000, what will it be after 2 years?