Question

step by step answer
Find the units digit of the expression 111 + 12 2+ 133 + 144 + 155 + 166​

Answer 1

add all the digits

(111+122)+(133+144)+(155+166)

=233+277+321

=831

therefore the answer is 831...

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Answer 2

111 + 122= 223

223 + 113 =336

336 + 144 = 480

480 + 115 = 595

595 + 166 = 761