Multiple Choice Questions
Unit A6
Number Classification
For each of these questions, choose the option (A, B, C or D) that is TRUE.
1
What is CLVII as an Arabic number?
  • (A)
    57
  • (B)
    153
  • (C)
    157
  • (D)
    253
2
What is 743 as a Roman numeral?
  • (A)
    DCCXVIII
  • (B)
    DMCCXLVIII
  • (C)
    DCCXLIII
  • (D)
    DCCXXXXIII
3
What is the sum of CCCXXIV + CCXLVI. giving your answer as a Roman Numeral.
  • (A)
    DCXX
  • (B)
    DLXVV
  • (C)
    DLXX
  • (D)
    DLXXX
4
Which of the following numbers are irrational?

0.45   ,     ,     ,   0.6...   ,     ,   π

  • (A)
      and   π
  • (B)
     ,   0.6...   and   π
  • (C)
    0.6...   and   π
  • (D)
      and   π
5
Which of the following numbers is irrational?
  • (A)
    1 −
  • (B)
    π2
  • (C)
  • (D)
    30 − 3−1 − 3−2
6
(1 + )(3 − ) =
  • (A)
    1
  • (B)
    2
  • (C)
    2 − 1
  • (D)
    1 + 2
7
a = 1 + and b = 1 − . Which one the following numbers is irrational?
  • (A)
    a + b
  • (B)
    ab
  • (C)
    (a + b)2
  • (D)
    a − b
8
(2 + )(2 − ) =
  • (A)
    1
  • (B)
    4 + 4
  • (C)
    4 − 4
  • (D)
    7
9
a = + 1 ,   b = − 1

Which of the following numbers are rational?

  • (A)
    a + b
  • (B)
    a2
  • (C)
    b2
  • (D)
    (a + b)2
10
The following number is in base 2.

1 1 1 0 0 1

What is its value in base 10 ?

  • (A)
    22
  • (B)
    39
  • (C)
    57
  • (D)
    114
11
The number 102 written in binary is
  • (A)
    0 1 1 0 0 1 1
  • (B)
    1 1 0 0 1 1
  • (C)
    1 1 0 1 1 0
  • (D)
    1 1 0 0 1 1 0
12
In binary arithmetic, calculate

1 1 0 1 0 − 1 1 0 1

  • (A)
    1 0 1
  • (B)
    1 0 1 1
  • (C)
    1 1 0 1
  • (D)
    1 0 1 0 1
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