Percent problems

1003055506

Level: 
A
A notebook and a pen cost the same amount of money. The price of the notebook was increased by \( 3\% \), and the price of the pen was increased by \( 5\% \). For the set consisting of \( 5 \) notebooks and \( 5 \) pens you need to pay more than before the rise
by \( 4\% \).
by \( 8\% \).
by \( 5\% \).
by \( 15\% \).

1003055508

Level: 
A
In a chess tournament \( 70\% \) of all participants were boys. Girls were \( 20\% \) of the number of boys. Other participants of the event were coaches and judges. Find the percentage of girls with the reference to all the participants of the tournament.
\( 14\% \) of all participants
\( 30\% \) of all participants
\( 50\% \) of all participants
Not enough information to find a solution.

1003055509

Level: 
A
Mr. Nowak deposited \( 2000 \) zlotys into his savings account at an annual interest rate of \( 4.5\% \), compounded annually. At the end of the year, the \( 19\% \) tax of the interest was deducted. What was the amount of the money deducted?
\( 17.10 \) zlotys
\( 19 \) zlotys
\( 38 \) zlotys
\( 85.50 \) zlotys