Integers Test -...

In his diary, a shopkeeper writes the selling prices of goods as positive numbers and the cost prices of the same goods as negative numbers. These were the entries in diary:

20, -15, 35, -20, 50, -10, 20, -30

Calculate the total profit made by the shopkeeper.

A man travelled 80 km northwards from A to B. From B, he travelled 70 km towards south along the same path. If the distance travelled along the north is represented in positive numbers, then how will the distance travelled along the south be represented? By which integer will you represent his final position from A?

Meteorologists forecast that the temperature will drop 6°C every hour. If at 12:00 noon, the temperature is 40°C, then what will be the temperature at 8:00 pm?

In a Chemistry test, there are 20 questions. For every correct answer, 3 marks are awarded and for every incorrect answer, 1 mark is deducted. If Geetika attempts 19 questions, out of which 13 are correctly answered, then how many marks does she get?

Match the following:

Find the incorrect statement from the following.