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1 mark

Select the numbers from among the given options that can replace the question marks (?) in the following series.
6,7,16,41,?,?,292

  1. A
    90, 171
  2. B
    95, 180
  3. C
    100, 220
  4. D
    115, 240

Solution & Step-by-step Explanation

Let's find the differences between consecutive terms:
7−6=1=1
2


16−7=9=3
2


41−16=25=5
2


The differences are squares of consecutive odd numbers (1
2
,3
2
,5
2
).
Following this pattern, the next differences should be 7
2
and 9
2
:

First missing term =41+7
2
=41+49=90

Second missing term =90+9
2
=90+81=171

Let's check the final term to verify:

171+11
2
=171+121=292

The pattern is verified, and the numbers are 90 and 171.

Practice this question

Try it yourself before checking the explanation above.

Select the numbers from among the given options that can replace the question marks (?) in the following series.
6,7,16,41,?,?,292
A
90, 171
B
95, 180
C
100, 220
D
115, 240

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