Question

The average temperature for 5 days was 100 degrees, and then it was cold for 1 day. That brought the average down to 90 degrees for the 6 day period. What is the temperature on the sixth day?

Answer 1

40

Explanation:

5 days temperature = 100

So the temperature have to add to 500

6 days temperature = 90

500 + ? = 540

?=40