1.Represent the following binary numbers in decimal form: (a) 1011101 and (b) 110101.

2.Round the following numbers correctly to six significant digits: (a) 35.674 57, (b) 0.000 231 45 and (c) 50 143.567

3. In a computer the value of ¼ 3.141 592 654 is approximated as 3.141 59 by chopping. What is the number of significant digits retained in the computer?

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