Instructions

In the following number series only one number is wrong. Find out the wrong number.

Question 30

2222, 1879, 1663, 1538, 1474, 1447, 1440

Solution

The pattern followed is :

2222 $$- 7^3$$ = 1879

1879 $$- 6^3$$ = 1663

1663 $$- 5^3$$ = 1538

1538 $$- 4^3$$ = 1474

1474 $$- 3^3$$ = 1447

1447 $$- 2^3$$ = 1439 $$\neq 1440$$

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