In the following number series, two numbers have been kept within brackets. Study the series carefully and select the correct option regarding the relationship of the series. 11, 101, 1001, (10001), 100001, (10000001)
The first bracketed number (from left) is correct and the second is wrong.
Each term is a power of 10 plus 1, the power increasing by 1 each time.
11 = 10 + 1
101 = 100 + 1
1001 = 1000 + 1
4th term = 10000 + 1 = 10001
5th term = 100000 + 1 = 100001
6th term = 1000000 + 1 = 1000001
The first bracketed number 10001 is correct, but the second bracketed number 10000001 should be 1000001, so it is wrong.
Hence, The first bracketed number (from left) is correct and the second is wrong.
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