Multiple choice

Directions: A number series is given below, in which only one number is wrong. Find out the wrong number. 1, 3, 10, 36, 152, 760, 4632

  1. 3

  2. 36

  3. 4632

  4. 760

  5. 152
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D Correct answer
Explanation

The pattern is x(n) = x(n-1) * n + (n-1)^2 starting from 1: 1*1+2=3, 3*2+4=10, 10*3+6=36, 36*4+8=152, 152*5+10=770. The term 760 is incorrect; it should be 770.

AI explanation

The series follows the pattern of multiplying by consecutive integers and adding an increasing number. 1 multiplied by 1 plus 2 is 3; 3 multiplied by 2 plus 4 is 10; 10 multiplied by 3 plus 6 is 36. Continuing this, 36 multiplied by 4 plus 8 gives 152, and 152 multiplied by 5 plus 10 gives 770. Since the given term is 760, it is the wrong number.

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