What should come in place of the question mark (?) in the given series?
31, 63, 127, 255, ?, 1023
The given series is: 31, 63, 127, 255, ?, 1023.
Observe the pattern:
Each number is one less than a power of 2.
31 is 2 raised to 5 minus 1 (i.e., 2⁵ – 1)
63 is 2⁶ – 1
127 is 2⁷ – 1
255 is 2⁸ – 1
The missing number should be 2⁹ – 1, which is 512 – 1 = 511
The last number 1023 is 2¹⁰ – 1
So, the correct number to fill in the blank is 511.
Final Answer: Option (C) 511
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100 Questions
100 Marks
90 Mins English English100 Questions100 Marks90 Mins English English40 Questions30 Marks25 Mins EnglishHow many pairs of consecutive numbers are there in the following number sequence each of which is in ascending order (Like 1, 2)?
7 6 7 8 6 7 5 6 8 7 7 8 6 5 4 5 6 3 4
Select the number from among the given options that can replace the question mark (?) in the following series.
36, 75, 147, 297, 591, ?
In the following question, select the missing number from the given series.
4, 15, 2, 17, ?, 19
The successor of a number is related to the predecessor in some way. The missing numbers in the given pattern is 2, 5, 7, 12, 19, 31, __, __
Choose the correct alternatives that will continue the same pattern and replace the question mark (?), in the following number series.
99, 33, 36, 12, 15, 5, ?
Complete the given series:
362, 364, _, 368, 370
Suggested Test Series
Suggested Test Series
