Multiple choice

In the following number series, only one number is wrong. Find out the wrong number. 625, 1296, 2401, 4096, 6560, 10000, 14641, 20736

  1. 1296

  2. 4096

  3. 6560

  4. 20736

  5. 10000
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series consists of powers: 25^2=625, 36^2=1296, 49^2=2401, 64^2=4096, 81^2=6561 (not 6560), 100^2=10000, 121^2=14641, 144^2=20736. 6560 is the wrong number.

AI explanation

The pattern is based on consecutive perfect squares of increasing integers: 625 is 25 squared, 1296 is 36 squared, 2401 is 49 squared, and 4096 is 64 squared. The next term should be 80 squared, which equals 6400. Since the series lists 6560 instead of 6400, it is the wrong number.

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