Question

Janet's math test consists of 20 problems.For every incorrectly solved problem ,she subtracts 5 points. For every problem that she skips , she receives 0 points. Janet earned 13 points on the test. How many problems did Janet try and solve?

Answer 1

23 kasi 20-5=15+13=23 yan lang alam ko HAHAHAHA

Answer 2

So, lets go to the first posible number that ends in 8 and is multiple of 8 and greater than 16. This is 48. 48 = 6*8, this is, lets think about 6 correct answers that sum 48 points.

We now need to subtract a number to 48 that gives us 13. Which is?

48 - x = 13 <----> x = 35

So, we need a number of incorrect answers that sum 35. As every wrong answer sums 5 points, we need 7 wring answers (7*5 = 35):

8*6 - 5*7 = 48 - 35 = 13 points!!

There were 14 problems tried to solve

Explanation: