The unit digit in the product 3^28 \times 11^42 \times 7^35 is:

Problems based on Numbers Test 5

Question : 17 of 40

Marks: +1, -0

The unit digit in the product

3^28 × 11^42 × 7^35

is:

Solution:

The unit digit of

3^28=3^{7×4}=3^0=1

.
The unit digit of

11^42=11^ 42 = 1

.
The unit digit of

7^35=7^{8×4}×7^3=3

.
The unit digit in the product

3^28×11^42×7^35

=1×1×3=3.

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