1) What is binary number of 21 ? a) 10101 b) 11001 c) 01011 2) What is binary number of 38 ? a) 111000 b) 100110 c) 100000 3) The binary number of 52 is 111000 ?  a) True b) False 4) The binary number of 129 is 10000001? a) True b) False 5) 72 represents 1001000 in binary number system. a) True b) False

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