Question : The average of five consecutive odd numbers is 27. What is the product of the first and the last number?
Option 1: 621
Option 2: 667
Option 3: 713
Option 4: 725
Correct Answer: 713
Solution : Since the average of 5 consecutive odd numbers will be its 3 rd term. So, find 1 st term by subtracting 4 from it and 5 th term by adding 4. So, 3rd term =27 Therefore, 1 st term = 27 - 4 = 23 and 5 th term = 27 + 4 = 31 So, the product of the first and the last number = 23 × 31 = 713 Hence, the correct answer is 713.
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Question : The average of twelve numbers is 39. The average of the last five numbers is 35, and that of the first four numbers is 40. The fifth number is 6 less than the sixth number and 5 more than the seventh number. The average of the fifth and sixth numbers is:
Question : The average of twelve numbers is 39. The average of the last five numbers is 35, and that of the first four numbers is 40. The fifth number is 6 less than the sixth number and 5 more than the seventh number. The average of the sixth and seventh numbers is:
Question : If the product of three consecutive numbers is 210, then the sum of the smaller number is:
Question : If the product of three consecutive numbers is 210, then the sum of the 2 smaller numbers is:
Question : The average of the first 7 integers in a series of 13 consecutive odd integers is 37. What is the average of the entire series?
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