Percent problems

2010008304

Level: 
A
At the beginning of the therapy, three monitored patients were of the same weight. Their weights were changing as follows: (a) Patient A gained \(6\%\) of his weight and then his weight did not change. (b) Patient B lost \(2\%\) of his weight first, but later he gained \(8\%\) of his weight. (c) Patient C gained \(2\%\) of his weight and later he gained another \(4\%\) of his weight. Which patient has the lowest weight after the therapy?
Patient B
Patient A
Patient C
After described weight changes everyone will weigh the same.

2010018205

Level: 
A
The number of traffic accidents in the monitored cities changed year on year. It increased by \(20\%\) in city A and decreased by \(1\%\) in city B. Decide which of the following statements is correct: \[ \begin{array}{l} \text{X: The same number of accidents occurred in city A as in city B the last year.} \\ \text{Y: There were more accidents in city A than in city B the last year.} \\ \text{Z: There have been fewer accidents in city B than in city A this year.}\\ \end{array} \]
The correctness of any of the above statements cannot be verified from the given data.
Only statement X is true.
Only statement Y is true.
Only statement Z is true.

1003066903

Level: 
B
The number of members of a certain golf club was increasing for the last three years by \( 20\% \) a year. How many members were there in the club three years ago, assuming that the number of them amounted to \( 216 \) a year ago?
\( 150 \) members
\( 200 \) members
\( 120 \) members
\( 250 \) members

1003066906

Level: 
B
The results of a survey considering the support for political parties \( Y \) and \( Z \) are presented in the table below. a) How many percentage points have the support for party \( Y \) increased? b) How much has the percentage of people supporting party \( Z \) decreased? \[\begin{array}{|c|c|c|} \hline & \text{February} & \text{March} \\\hline Y & 16\% & 20\% \\\hline Z & 10\% & 8\% \\\hline \end{array}\]
a) by \( 4 \) percentage points, b) by \( 20\% \)
a) by \( 25 \) percentage points, b) by \( 2\% \)
a) by \( 25 \) percentage points, b) by \( 20\% \)
a) by \( 4 \) percentage points, b) by \( 2\% \)

1003066907

Level: 
B
The results of a survey considering the support for political parties \( Y \) and \( Z \) are presented in the table below. a) How many percentage points have the support for party \( Z \) decreased? b) How much has the percentage of people supporting party \( Y \) increased? \[\begin{array}{|c|c|c|} \hline & \text{February} & \text{March} \\\hline Y & 16\% & 20\% \\\hline Z & 10\% & 8\% \\\hline \end{array}\]
a) by \( 2 \) percentage points, b) by \( 25\% \)
a) by \( 20 \) percentage points, b) by \( 4\% \)
a) by \( 20 \) percentage points, b) by \( 25\% \)
a) by \( 2 \) percentage points, b) by \( 4\% \)