Question

the Units digit of (1997)³ =
a)1
b)9
c)3
d)7
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Answer 1

the answer is 7.

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Answer 2

Answer:

option C

Step-by-step explanation:

for this first we need to write the units digits of 7 when the powers are increasing

7⁰ = 1

7¹ = 7

7² = 9

7³ = 3

7⁴ = 1

7⁵ = 7

7⁶ = 9

7⁷ = 3

so for every 4 times the numbers are repeating so here 7³ is 3

so the units digit for the number (1997)³ is 3

option C is the right answer