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Multiple choice

In the following number series only one number is wrong. Find out the wrong number. 2184 1716 1320 990 719

  1. 2184

  2. 1716

  3. 1320

  4. 719

  5. 990
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pattern: 13^3-13=2184, 12^3-12=1716, 11^3-11=1320, 10^3-10=990, 9^3-9=729. The number 719 is incorrect; it should be 729 following the pattern n^3-n for n=13,12,11,10,9.

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