Multiple choice

In the following number series only one number is wrong. Find out the wrong number. 488 245 124 64 35 20.25

  1. 488

  2. 245

  3. 64

  4. 35

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern is: divide by 2 and add 1 alternately. 488 ÷ 2 + 1 = 245, 245 ÷ 2 + 1.5 = 124, 124 ÷ 2 + 2 = 64, 64 ÷ 2 + 3 = 35, 35 ÷ 2 + 2.75 = 20.25. Actually 35 should be 35, but wait - let's recalculate: 488/2 + 1 = 245, 245/2 + 1.5 = 124, 124/2 + 2 = 64, 64/2 + 2.5 = 34.5, 34.5/2 + 3 = 20.25. So 35 is wrong.

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