20157

Question

On a certain night half of the moon is black, 310\dfrac{3}{10} is grey and the rest of the moon is lit up brightly.

What fraction of the moon is lit up brightly?

Worked Solution
Fraction brightly lit = 1−(12+310)1 - \bigg( \dfrac{1}{2} + \dfrac{3}{10} \bigg)
= 1−8101 - \dfrac{8}{10}
= {{{correctAnswer}}}

Variant 0

DifficultyLevel

574

Question

On a certain night half of the moon is black, 310\dfrac{3}{10} is grey and the rest of the moon is lit up brightly.

What fraction of the moon is lit up brightly?

Worked Solution
Fraction brightly lit = 1−(12+310)1 - \bigg( \dfrac{1}{2} + \dfrac{3}{10} \bigg)
= 1−8101 - \dfrac{8}{10}
= 15\dfrac{1}{5}

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
correctAnswer
$\dfrac{1}{5}$

Answers

Is Correct?Answer
x

16\dfrac{1}{6}

✓

15\dfrac{1}{5}

x

810\dfrac{8}{10}

x

1012\dfrac{10}{12}