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70 = 1 : 71 = 7 ; 72 = 49 : 73 = 343 : 74 = 2401

The final digit repeats as the exponent increases by 4.

So 735 has the same final digit (3) as 73 : 760 has the same final digit (1) as 70.

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14y ago
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Q: What is the pattern of exponents of 7?
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