Some workers are assigned to paint the wall of a museum. If 7 workers can paint 582.4 m of the wall in an hour, then how many meters of the wall will 13 workers paint in an hour?

There are two teams of two people each competing in a relay race. The race is for 1km, and each member of a team has to run 500 meters Marceline and Jahllo are in one team, and the Wadha twins form the second team. Marceline can run 500 meters in

2

8

15

minutes. Jahllo can run 500 meters in

2

11

30

minutes. Each of the Wadha twins can run 500 meters in

2

7

10

minutes. Which pair will win the race and by how much time?

A.

Wadha twins will win the race by 30 seconds

B.

Marceline and Jahllo will win the race by 27 seconds

C.

Wadha twins will win the race by 27 seconds

D.

Marceline and Jahllo will win the race by 30 seconds

In an exam of Mathematics and History, 36% and 21% students failed in Mathematics and History respectively. If 14% students failed both in Mathematics and History, find the percentage of students who passed in both the exams.

A grocer bought 14 boxes of pears, with each box containing a dozen pears. He paid SR7 per pear. He then sold the entire lot at a loss of SR840. At what price (in Roman numerals) did he sell each box?