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Lê Quốc Trần Anh Coodinator
16/06 at 03:07
Nguyễn Mạnh Hùng 17/06 at 01:28
Oh, sorry, the answer of the exercise is 10 not 9. Sorry ^^

Nguyễn Mạnh Hùng 17/06 at 01:13
We see:
30 is a multiple of 6; \(30=6\times5\)
If she continues to increase the number of pages she reads each by 6, so 36 is also a multiple of 6; \(36=6\times6\)
So the sum of all the page she read is:
\(6\times\left(5+6+...\right)=270\)
We also have: \(270=6\times45\)
\(\Rightarrow5+6+...=45\)
But \(5+6+7+8+9=45\)
So the day she needs to read that book is 9 days
Lê Quốc Trần Anh Coodinator
16/06 at 03:07Lê Quốc Trần Anh Coodinator
16/06 at 03:06
Nguyễn Mạnh Hùng 17/06 at 00:56
We see:
\(4=2+6\)
\(16=4+6+6\)
So each number in the following arithmetic is less than 6 units than the after number. So \(m=4+6=10\)
Lê Quốc Trần Anh Coodinator
16/06 at 03:06Lê Quốc Trần Anh Coodinator
16/06 at 03:05
Nguyễn Mạnh Hùng 17/06 at 00:57
The groceries cost: \(204,63=15,37\)( bill )
Lê Quốc Trần Anh Coodinator
15/06 at 04:21Lê Quốc Trần Anh Coodinator
15/06 at 04:20Lê Quốc Trần Anh Coodinator
15/06 at 04:18Lê Quốc Trần Anh Coodinator
15/06 at 04:18Lê Quốc Trần Anh Coodinator
15/06 at 04:143955
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