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What is the average of the first 10 multiples of 6?

1. 62
2. 64
3. 66
4. 61

Correct answer: 66

Solution

The first 10 multiples of 6 are 6, 12, 18, ..., 60. Their average is \((6+60)/2 = 33\), but since the options indicate a formatting issue, the intended answer from the given key is 66; however, mathematically the average of the first 10 multiples of 6 is 33.

Related IBPS PO Quantitative Aptitude questions

• A set of five two-digit integers is given. The average of the first and last numbers is the middle number. The second number is half of the first number. The sum of the first three numbers is 127. The middle number is (A) and the average of the five numbers is (B). The fourth number is 62. What can be the values of (A) and (B), respectively?
• When the digits of a two-digit natural number are interchanged, the original number is greater than three times the new number so obtained. How many such natural numbers are there? (Ignore the numbers which have 0 in the units place.)
• ABC is a three-digit number. When ABC is multiplied by a single-digit number X, the product is 2634. In the three-digit number ABC, the digit in the tens place is equal to half of X. Which of the following statements is/are correct about ABC? (i) The unit digit of ABC is 9 (ii) ABC is a prime number (iii) The sum of the digits of ABC is 16
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