defence exam Army Havildar SAC Mock Test Series 2025 Quantitative Aptitude Average

The average of 35 consecutive natural numbers is N. Dropping the first 10 numbers and including the next 10 numbers, the average is changed to M. If the value of M² - N² = 600, then the average of 3M and 5N is:

1

90

2

115

3

100

4

120

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