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Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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Find the missing number in the sequence: 5, 11, 23, 47, #
95
91
99
89
95
Double each number and add 1 to get the next consecutive term.
Double each number and add 1 to get the next consecutive term.
Analyze the Sequence
Observe the growth of numbers from 5 to 11, 11 to 23, and 23 to 47, which indicates a doubling pattern with a small addition.
Verify the Rule
Test the pattern multiply by 2 and add 1: 5 x 2 + 1 = 11, 11 x 2 + 1 = 23, 23 x 2 + 1 = 47.
Find the Missing Value
Apply the rule to the final given number: 47 x 2 + 1 = 94 + 1 = 95.
B: 91 is incorrect because 47 x 2 + 1 results in 95. C: 99 is incorrect as it exceeds the correct calculated value. D: 89 is incorrect because it is less than the required calculation.
A is correct because multiplying 47 by 2 and adding 1 yields the missing number 95.
When terms grow rapidly in a number series, check for multiplication or square/cube combinations before checking differences.
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