Multiple choice

A number series is given below in which only one number is wrong. Find out the wrong number. 7 8 19 62 245 1284

  1. 245

  2. 62

  3. 1284

  4. 19

  5. 8
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A Correct answer
Explanation

The pattern is x * 1 + 1, x * 2 + 3, x * 3 + 5, x * 4 + 7, x * 5 + 9. 7*1+1=8, 8*2+3=19, 19*3+5=62, 62*4+7=255. The number 245 is incorrect; it should be 255.

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