maths

Please help me on these problem solving sums. Also show the rough work and answer.

First question: If 15% of the children walk to school, 7% cycle to school and 30% come by bus, what percentage come by car ?

2. How much for forty steel nails at €2.50 per 100 ?
3. What is the value of "y" if y + 5 =21+5?
4. If you subtract an odd number from an odd number, is the answer an odd number or an even number?
5. A country newsagent sells 60 newspaper on a Sunday and an average of 25 newspaper each of the other days. What is her daily average for the whole week?
6. €10 is divided in the ratio 1:3. How much is the larger share?

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asked by liam
  1. 100 - 15 - 7 - 30

    40 (2.5/100)

    y + 5 - 5 = 21 + 5 - 5

    3-1 = 2

    (60 + 6*25) /7

    1 x + 3 x = 4 x = 10
    x = 10/4 = 5/2

    3 x = 15/2 = 7.5

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    posted by Damon

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