Current location - Training Enrollment Network - Mathematics courses - Xiaoming did 30 math problems in five days, one more than the day before. How many questions did Xiaoming do every day these five days?
Xiaoming did 30 math problems in five days, one more than the day before. How many questions did Xiaoming do every day these five days?
Solution: Suppose that on the third day, we did (X-2) and (X- 1) on the first day, the second day, the fourth day and the fifth day respectively.
(X+ 1) channel and (X+2) channel.
(X- 1)+(X+ 1)+X+(X+2)+(X-2)= 30
5X=30
X=6
X- 1=5，X+ 1=7，X+2=8，X-2=4
A: Xiaoming does 4, 5, 6, 7 and 8 questions every day.