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# Gcse maths watch

1. Q1.The cross section is the shaded region between the curve and the x-axis.
The curve has equation y = x^2/10-3x

where x and y are both measured in centimetres.
Find the depth of the bowl.

Q2. A company orders a number of bottles from a factory.
The 8 machines in the factory could make all the bottles in 5 days.
All the machines work at the same rate.
For 2 days, only 4 machines are used to make the bottles.
From the 3rd day, all 8 machines are used to make the bottles.
Work out the total number of days taken to make all the bottles.
Q3. Prove algebraically that the difference between any two different odd numbers is an even number.
2. (Original post by Official-21)
Q1.The cross section is the shaded region between the curve and the x-axis.
The curve has equation y = x^2/10-3x

where x and y are both measured in centimetres.
Find the depth of the bowl.

Q2. A company orders a number of bottles from a factory.
The 8 machines in the factory could make all the bottles in 5 days.
All the machines work at the same rate.
For 2 days, only 4 machines are used to make the bottles.
From the 3rd day, all 8 machines are used to make the bottles.
Work out the total number of days taken to make all the bottles.
Q3. Prove algebraically that the difference between any two different odd numbers is an even number.
What have you tried so far?
3. Struggling for the first question and for the last question I did 2n+1 2m+3
4. Not really any help as I hate questions like the 3rd one but I'm think possibly it follows the lines of: 2(n - m) - not sure after this but think it follows this kind of format?
5. I need really help in question 2 and 3 pleaseeee anyone
6. (Original post by Official-21)
I need really help in question 2 and 3 pleaseeee anyone
Start by calculating how many days it would take 4 machines to make all the bottles then hence calculate what proportion of the total no. of bottles have been made by the end of day 2.
7. What do you mean
8. What would you times by 4
9. Try using algebra and input your know values (machine + days) and try working it out from there (Q3)

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