Check that the given arrangement ends with which one of the following?

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answer is B.

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Detailed Solution

Concept: In order to answer this question, we will approach it in such a way that we first check for

, then for

, then combine their results by multiplication, and then check that it finishes with which number by generalizing.
Consider

and then substitute m = 1, 2, 3, 4,.. as

.
Results include

…….
Here, we may state that an even integer is always the result.
Taking into account 5n with n = 1, 2, 3, 4,...... then as

As a result,

In this case, we can state that 5 are always present in the unit place. Now, if we multiply both of these, we will always receive 0 at the unit's location because 5 is multiplied by an even integer. Consequently, we can conclude from this generalisation that

ends with 0.
Hence, the correct option is 2.

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