Question

sum of last two digits of 7^2020​

Answer 1

Sum of Last two Digits  of 7²⁰²⁰ = 1

Step-by-step explanation:

7¹ = 07

7² = 49

7³ = 343

7⁴ = 2401

7⁵ = 16807

7⁶ = 117649

7⁷ = 8,23,543

7⁸ = 57,64,801

Sequence of  Last two digits keep repeating

7²⁰²⁰ = (7⁴)⁵⁰⁵

Hence 7²⁰²⁰ will end with 01

Sum of Last two Digits = 0 + 1 = 1

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