Mathematics for IGCSE & O level - Surds (Section 3)

• 1

  Rationalize the denominator of √2 / (√3).

  Απάντηση

  (A)

  √6 / 3
• 2

  Which calculation below will result in a rational answer?

  Απάντηση

  C

  D
• 3

  Which expression simplifies to a rational number?

  Απάντηση

  (C)

  (2+√3) * (2-√3)
• 4

  What is the result of simplifying (2 + √5)(2 - √5)?

  Απάντηση

  (A)

  -1
• 5

  Rationalize the denominator: (√2 + 1)/ (√2 - 1).

  Απάντηση

  (A)

  3+2√2
• 6

  If x = 5 + √5 and y = 5 - 2√5, what is x + y?

  Απάντηση

  (C)

  10
• 7

  Simplify 5 + √5 - 2√5.

  Απάντηση

  (A)

  5 - √5
• 8

  Which of the following is not a surd?

  Απάντηση

  (C)

  √9
• 9

  What is the result of rationalizing the denominator of 3/√6?

  Απάντηση

  (A)

  √6 / 2