## Friday, 9 September 2011

### Maths questions

Dear all,
Try out these questions on the rough papers and we will discuss them in class on Monday during Supplementary class.

1.  On Monday, there were 600 more male adults than female adults at the farm. On Tuesday, the number of male adults decreased by 10% while the number of female adults increased by 20%. There were 1170 adults altogether at the farm on Tuesday.
(a) How many male adults were there at the farm on Thursday?
(b) If each farm ticket cost \$8, how much money was collected from the sale of the tickets for the two days?

2.  Mr Devran sold 160 more durian puffs than cream puffs on Wednesday. On Thursday, the number of durian puffs sold decreased by 10% while the number of cream puffs sold increased by 20%. A total of 459 durians and cream puffs were sold on Thursday.
(a) Find the number of durian puffs sold on Wednesday.
(b) If each puff was sold at \$1.20, how much money did Mr Devran collect from the sale on Wednesday and Thursday?

3. Shop A sells a mobile phone for \$494. This is 30% more than the price of a similar model in shop B.
(a) Find the price of the mobile phone in shop B.
(b) During a sale, both shops offered an equal percentage discount on the mobile phone. Henry bought the mobile phone in shop B and found that he paid \$85.50 less than the discounted price in shop A. What was the percentage discount?

4.  Shop A sells a digital camera for \$512. This is 28% more than the price of a similar camera in shopB.
(a) Find the price of the digital camera in shop B.
(b) During a sale, both shops offered an equal percentage discount on the digital camera. Mr Roger bought the digital camera in shop A and found that he could have saved \$84 if he had bought the digital camera in shop B. What was the percentage discount?

Do make good use of this weekend to recharge yourselves fully before the start of the school term.
Corrections for Practice 8a, 8b and 9a, please make sure you clear them.

Have a good weekend !

Love you,
Mrs Mak