Percent problems and financial mathematics

2010006401

Level:

Of the school's $300$ pupils, $67\%$ attend the sports club and $42\%$ attend the music club. $18\%$ attend both clubs. How many children do not attend any club?

$27$ children

$81$ children

$87$ children

$30$ children

2010006402

Level:

One third of a number $ a $ is by $ 75\% $ greater than one seventh of a number $ b $. Choose the true statement.

The number $a$ is by $25\%$ smaller than $b$.

The number $a$ is by $75\%$ smaller than $b$.

The number $a$ is by $400\%$ greater than $b$.

The number $a$ is by $75\%$ greater than $b$.

2010006403

Level:

Find the number $ x $ if $ 40\% $ of its half is $ 70\% $ of the number $ x -3$.

$ 4\frac15 $

$ 5\frac14 $

$ 5 $

$ 5\frac25 $

9000078909

Level:

The salary of an employee is decreased by the tax at a flat rate $14.5\, \%$. An employee paid the tax $\$3\: 683$. Find his/her take home pay (i.e. the pre-tax income decreased by the tax).

$\$21\: 717$

$\$25\: 400$

$\$21\: 971$

$\$23\: 352$

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Percent problems and financial mathematics

2010006401

2010006402

2010006403

9000078909

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