Number Systems MCQs, Set 1 of 2
Q1 / 50
Q1. What is the decimal number 68 in binary?
- A.1000010
- B.1000100(correct answer)
- C.1000110
- D.1000000
Divide 68 repeatedly by 2 and read the remainders from last to first: 68 = 1000100 in base 2.
Q2. What is the binary number 10100110 in decimal?
- A.167
- B.166(correct answer)
- C.164
- D.165
Multiply each digit by its place value (powers of 2) and add: 10100110 in base 2 = 166.
Q3. What is the decimal number 3864 in hexadecimal?
- A.F16
- B.F19
- C.F1C
- D.F18(correct answer)
Divide 3864 repeatedly by 16 and read the remainders from last to first: 3864 = F18 in base 16.
Q4. What is the hexadecimal number 73D in decimal?
- A.1837
- B.1869
- C.1849
- D.1853(correct answer)
Multiply each digit by its place value (powers of 16) and add: 73D in base 16 = 1853.
Q5. What is the decimal number 489 in octal?
- A.747
- B.751(correct answer)
- C.750
- D.741
Divide 489 repeatedly by 8 and read the remainders from last to first: 489 = 751 in base 8.
Q6. What is the octal number 105 in decimal?
- A.70
- B.69(correct answer)
- C.65
- D.71
Multiply each digit by its place value (powers of 8) and add: 105 in base 8 = 69.
Q7. What is the decimal number 43 in binary?
- A.101010
- B.100011
- C.101100
- D.101011(correct answer)
Divide 43 repeatedly by 2 and read the remainders from last to first: 43 = 101011 in base 2.
Q8. What is the binary number 11001101 in decimal?
- A.201
- B.203
- C.205(correct answer)
- D.207
Multiply each digit by its place value (powers of 2) and add: 11001101 in base 2 = 205.
Q9. What is the decimal number 1096 in hexadecimal?
- A.446
- B.44A
- C.438
- D.448(correct answer)
Divide 1096 repeatedly by 16 and read the remainders from last to first: 1096 = 448 in base 16.
Q10. What is the hexadecimal number F33 in decimal?
- A.3892
- B.3891(correct answer)
- C.3889
- D.3890
Multiply each digit by its place value (powers of 16) and add: F33 in base 16 = 3891.
Q11. What is the decimal number 394 in octal?
- A.613
- B.610
- C.612(correct answer)
- D.602
Divide 394 repeatedly by 8 and read the remainders from last to first: 394 = 612 in base 8.
Q12. What is the octal number 717 in decimal?
- A.463(correct answer)
- B.464
- C.462
- D.465
Multiply each digit by its place value (powers of 8) and add: 717 in base 8 = 463.
Q13. What is the decimal number 141 in binary?
- A.10001110
- B.10001001
- C.10001101(correct answer)
- D.10001011
Divide 141 repeatedly by 2 and read the remainders from last to first: 141 = 10001101 in base 2.
Q14. What is the binary number 10110 in decimal?
- A.18
- B.20
- C.22(correct answer)
- D.30
Multiply each digit by its place value (powers of 2) and add: 10110 in base 2 = 22.
Q15. What is the decimal number 2459 in hexadecimal?
- A.9AB
- B.99A
- C.99D
- D.99B(correct answer)
Divide 2459 repeatedly by 16 and read the remainders from last to first: 2459 = 99B in base 16.
Q16. What is the hexadecimal number 4B8 in decimal?
- A.1209
- B.1210
- C.1208(correct answer)
- D.1207
Multiply each digit by its place value (powers of 16) and add: 4B8 in base 16 = 1208.
Q17. What is the decimal number 14 in octal?
- A.16(correct answer)
- B.14
- C.20
- D.15
Divide 14 repeatedly by 8 and read the remainders from last to first: 14 = 16 in base 8.
Q18. What is the octal number 127 in decimal?
- A.88
- B.86
- C.83
- D.87(correct answer)
Multiply each digit by its place value (powers of 8) and add: 127 in base 8 = 87.
Q19. What is the decimal number 161 in binary?
- A.10100010
- B.10100000
- C.10100001(correct answer)
- D.10100011
Divide 161 repeatedly by 2 and read the remainders from last to first: 161 = 10100001 in base 2.
Q20. What is the binary number 1000001 in decimal?
- A.63
- B.73
- C.67
- D.65(correct answer)
Multiply each digit by its place value (powers of 2) and add: 1000001 in base 2 = 65.
Q21. What is the decimal number 1648 in hexadecimal?
- A.670(correct answer)
- B.66E
- C.680
- D.674
Divide 1648 repeatedly by 16 and read the remainders from last to first: 1648 = 670 in base 16.
Q22. What is the hexadecimal number 4F8 in decimal?
- A.1272(correct answer)
- B.1270
- C.1271
- D.1288
Multiply each digit by its place value (powers of 16) and add: 4F8 in base 16 = 1272.
Q23. What is the decimal number 422 in octal?
- A.644
- B.650
- C.646(correct answer)
- D.656
Divide 422 repeatedly by 8 and read the remainders from last to first: 422 = 646 in base 8.
Q24. What is the octal number 525 in decimal?
- A.342
- B.343
- C.339
- D.341(correct answer)
Multiply each digit by its place value (powers of 8) and add: 525 in base 8 = 341.
Q25. What is the decimal number 142 in binary?
- A.10010000
- B.10001110(correct answer)
- C.10001101
- D.10001111
Divide 142 repeatedly by 2 and read the remainders from last to first: 142 = 10001110 in base 2.
Q26. What is the binary number 10000101 in decimal?
- A.141
- B.129
- C.131
- D.133(correct answer)
Multiply each digit by its place value (powers of 2) and add: 10000101 in base 2 = 133.
Q27. What is the decimal number 1619 in hexadecimal?
- A.654
- B.653(correct answer)
- C.65B
- D.652
Divide 1619 repeatedly by 16 and read the remainders from last to first: 1619 = 653 in base 16.
Q28. What is the hexadecimal number E4F in decimal?
- A.3664
- B.3663(correct answer)
- C.3659
- D.3647
Multiply each digit by its place value (powers of 16) and add: E4F in base 16 = 3663.
Q29. What is the decimal number 455 in octal?
- A.707(correct answer)
- B.710
- C.703
- D.717
Divide 455 repeatedly by 8 and read the remainders from last to first: 455 = 707 in base 8.
Q30. What is the octal number 42 in decimal?
- A.35
- B.34(correct answer)
- C.33
- D.26
Multiply each digit by its place value (powers of 8) and add: 42 in base 8 = 34.
Q31. What is the decimal number 77 in binary?
- A.1001110
- B.1001101(correct answer)
- C.1001001
- D.1001100
Divide 77 repeatedly by 2 and read the remainders from last to first: 77 = 1001101 in base 2.
Q32. What is the binary number 11011100 in decimal?
- A.216
- B.220(correct answer)
- C.218
- D.212
Multiply each digit by its place value (powers of 2) and add: 11011100 in base 2 = 220.
Q33. What is the decimal number 438 in hexadecimal?
- A.1B6(correct answer)
- B.1C6
- C.1B2
- D.1B5
Divide 438 repeatedly by 16 and read the remainders from last to first: 438 = 1B6 in base 16.
Q34. What is the hexadecimal number DE0 in decimal?
- A.3551
- B.3536
- C.3552(correct answer)
- D.3553
Multiply each digit by its place value (powers of 16) and add: DE0 in base 16 = 3552.
Q35. What is the decimal number 463 in octal?
- A.721
- B.720
- C.707
- D.717(correct answer)
Divide 463 repeatedly by 8 and read the remainders from last to first: 463 = 717 in base 8.
Q36. What is the octal number 265 in decimal?
- A.177
- B.181(correct answer)
- C.183
- D.189
Multiply each digit by its place value (powers of 8) and add: 265 in base 8 = 181.
Q37. What is the decimal number 103 in binary?
- A.1101000
- B.1100111(correct answer)
- C.1101001
- D.1100101
Divide 103 repeatedly by 2 and read the remainders from last to first: 103 = 1100111 in base 2.
Q38. What is the binary number 11000001 in decimal?
- A.194
- B.192
- C.191
- D.193(correct answer)
Multiply each digit by its place value (powers of 2) and add: 11000001 in base 2 = 193.
Q39. What is the decimal number 1025 in hexadecimal?
- A.3FF
- B.411
- C.409
- D.401(correct answer)
Divide 1025 repeatedly by 16 and read the remainders from last to first: 1025 = 401 in base 16.
Q40. What is the hexadecimal number 8D4 in decimal?
- A.2261
- B.2260(correct answer)
- C.2268
- D.2259
Multiply each digit by its place value (powers of 16) and add: 8D4 in base 16 = 2260.
Q41. What is the decimal number 418 in octal?
- A.641
- B.642(correct answer)
- C.640
- D.643
Divide 418 repeatedly by 8 and read the remainders from last to first: 418 = 642 in base 8.
Q42. What is the octal number 300 in decimal?
- A.184
- B.192(correct answer)
- C.190
- D.193
Multiply each digit by its place value (powers of 8) and add: 300 in base 8 = 192.
Q43. What is the decimal number 147 in binary?
- A.10010100
- B.10010011(correct answer)
- C.10010010
- D.10011011
Divide 147 repeatedly by 2 and read the remainders from last to first: 147 = 10010011 in base 2.
Q44. What is the binary number 1011011 in decimal?
- A.92
- B.91(correct answer)
- C.90
- D.83
Multiply each digit by its place value (powers of 2) and add: 1011011 in base 2 = 91.
Q45. What is the decimal number 1187 in hexadecimal?
- A.4B3
- B.4AB
- C.4A7
- D.4A3(correct answer)
Divide 1187 repeatedly by 16 and read the remainders from last to first: 1187 = 4A3 in base 16.
Q46. What is the hexadecimal number 9A0 in decimal?
- A.2465
- B.2464(correct answer)
- C.2463
- D.2448
Multiply each digit by its place value (powers of 16) and add: 9A0 in base 16 = 2464.
Q47. What is the decimal number 484 in octal?
- A.744(correct answer)
- B.742
- C.743
- D.745
Divide 484 repeatedly by 8 and read the remainders from last to first: 484 = 744 in base 8.
Q48. What is the octal number 237 in decimal?
- A.160
- B.159(correct answer)
- C.158
- D.161
Multiply each digit by its place value (powers of 8) and add: 237 in base 8 = 159.
Q49. What is the decimal number 150 in binary?
- A.10010100
- B.10011000
- C.10010110(correct answer)
- D.10010010
Divide 150 repeatedly by 2 and read the remainders from last to first: 150 = 10010110 in base 2.
Q50. What is the binary number 101110 in decimal?
- A.47
- B.46(correct answer)
- C.45
- D.44
Multiply each digit by its place value (powers of 2) and add: 101110 in base 2 = 46.