The length, breadth and height of a room are 9 m 20 cm, 5 m 60 cm, and 5 m 10 cm, respectively. What is the length of the longest rod which can measure the dimensions of the room exactly?

Yoet and Frida are friends as well as cricket coaches in the same school. Yoet goes to Lotus Valley school every 2 days while Frida goes there every 7 days to deliver coaching classes. If they both delivered the coaching sessions today, how many days, in the next 112 days, will both of them be delivering the coaching sessions on the same day?

The street vendor sells 202.33 liters of cranberry juice on Sunday and 15.1 liters more than this quantity on Monday. The following day, 12.06 liters less cranberry juice was sold than the quantity sold on Monday. How many liters of cranberry juice was sold on Tuesday?

Hibram's income is 50% less than Victor's income, David's income is 20% less than Hibram's income, and Christian's income is 40% less than Hibram's income. Victor gave 50% of his income to David and 50% of his income to Christian, David's new income would be what fraction of Christian's new income?

There are 40 questions in a competitive exam. 2 marks are awarded for each correct answer, while 2 marks are deducted for each incorrect answer. Cristhian answered 25 questions correctly. If he attempts all the questions, how many marks did he get?