The unit's digit in the product (7^71 \times 6^59 \times 3^65) is:

Number System Practice Test 4

Question : 3 of 40

Marks: +1, -0

The unit's digit in the product

(7^71 × 6^59 × 3^65)

is:

Solution:

(7^71 × 6^59 × 3^65)

= [7^(17 × 4 + 3) × 6^(14 × 4 + 3) × 3^(16 × 4 + 1)]

Hence, required digit = Unit digit in (3 × 6 × 3) = 4

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