7. Oisín received 32x marbles as a gift for him and his three brothers. If Oisín has to share these marbles with three of his brothers, how many will each person get? Give your answer in terms of x .
8. The number of cows John has is 90 y . If John wants to divide his cows equally between 15 fi elds, how many cows go into each fi eld? Give your answer in terms of y .
11. Mary Ann saves money in a piggy bank. She records how much she saves in a notebook in code form, so she is the only one who knows the actual amount saved. If she records her total savings as 350xy, write down a term which represents one fi fth of her savings.
12. Harry recorded the total number of chairs to put in a hall for a concert as 450 x 2
y .
The number of rows of seats Harry arranged in the hall is 45xy. How many seats are in one row of the hall?
13. Copy and complete the following table. Expression Simplifi ed expression
(i)
_ 3
6x (ii)
_ 2a
10 a2 (iii)
_ 4pq
− 8 p3 q (iv)
_ 3x
(v) _ 7 a2
(vi) _ 4 x2 − 20 x5 y3 5 x2 3 a2 b4 y
______ 50v
_____ − 6ab
_____ 7xy
_____ − 12ab
12 ab 2
9. Jack has a rectangular fl oor with an area of 4 x 2
, as shown.
Find the area of one-quarter of this fl oor. 4 x 2
10. Bridget has a rectangular fi eld with an area of 12 ab 2