Maths Challenging Sums (4)

1. Pen A cost $4 more than Pen B and $7 more than Pen C.
    The total cost of the three pens is $28. Find the cost of pen A. (3m)

2. Cheryl read 1/3 of the pages of a storybook on Saturday and 1/4 of it on Sunday. On Monday, she found that she had 60 pages more to read. How many pages were there in the storybook?(3m)

3. Mrs Cheong bought a skirt and 4 similar T-shirts for $34.80.She discovered that she could buy 3 such skirts with the same amount of money. Find the cost of 1 T-shirt. (3m)