The digit at units place of the sum -1-2-2-2-3-2-20009-25017

The correct option is D 7(5!)^2,(6!)^2,(7!)^2 And so on will contain 0 in units place ∴ 1+4+36+576 ⇒ Units place is 7 ...

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nCr Definitions and Properties

The digit at ...

Question

The digit at units place of the sum $(1!)^{2} + (2!)^{2} + (3!)^{2} + . . . . . + (20009)^{2}$

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Similar questions

(1!)^{2} + (2!)^{2} + (3!)^{2} + . . . . . + (20009)^{2}

The digit at the unit place of $(1!)^{2} + (2!)^{2} + (3!)^{2} + (4!)^{2} . . . . . . (2015!)^{2}$

n > 1

\sum_{r = 0}^{100} r! + 2^{2^{n}}

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