On Monday, Oscar read
58 of a textbook. On Tuesday, he read 32 pages of the textbook. On Wednesday, he read
37 of the remaining book leaving 76 pages unread.
- Find the number of pages read on Wednesday.
- Find the total number of pages in the textbook.
(a)
Number of remaining unread pages after reading on Tuesday = 7 u
Number of remaining unread pages after reading on Wednesday
= 7 u - 3 u
= 4 u
4 u = 76
1 u = 76 ÷ 4 = 19
Number of pages that Oscar read on Wednesday
= 3 u
= 3 x 19
= 57
(b)
Working backwards.
Number of pages unread after reading on Tuesday
= 7 u
= 7 x 19
= 133
Total number of pages in the textbook = 8 p
Number of pages unread after reading on Monday
= 8 p - 5 p
= 3 p
3 p = 32 + 133
3 p = 165
1 p = 165 ÷ 3 = 55
Total number of pages in the textbook
= 8 p
= 8 x 55
= 440
Answer(s): (a) 57; (b) 440