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What is the missing number? 4, 9, 16, 25, ?

Correct answer: B. 36

  • A. 30
  • B. 36
  • C. 49
  • D. 40

Explanation

The sequence of numbers given is 4, 9, 16, 25. These numbers are consecutive perfect squares: 2², 3², 4², and 5². The pattern involves squaring consecutive integers. Therefore, the missing number should be the square of the next integer, which is 6. Thus, the missing number is 36 (6²). Option A (30) and Option D (40) are not perfect squares, so they do not fit the pattern. Option C (49) is a perfect square, but it corresponds to 7², skipping the next integer in the sequence.

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Logical problems present several conditions about people, objects, events or choices and require their possible arrangements to be tested. They cover constraint-based reasoning, rankings, matching, grouping, scheduling and elimination, with attention to the difference between a complete solution and a possibility that merely satisfies one condition.

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