Question
Ten numbers are arranged in decreasing order. The
average of the first nine numbers is 55, and the average of the last nine numbers is 50. What is the difference between the first and the last number?Solution
More No. System Questions
32, 16, 24, 60, 207, 945
80, 88, 101, 122, 150, 185
2, 10, 30, 64, 130, 222
- Find the wrong number in the series.
1, 8, 27, 65, 125, 216, 343 74, 79, 86.5, 101.5, 109, 124, 141.5
62, 79, 98, 119, 142, 165
In each of the following giving number series, a wrong number is given. Find out the wrong number?
82, 81, 86, 110, 168, 287
54Â Â Â Â 54Â Â Â Â Â 108Â Â Â Â 39Â Â Â Â 144Â Â Â Â 28.8
Find the wrong number in the given number series.
2, 4, 12, 48, 120, 1440
127, 137, 148, 164, 169, 185, 199
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