Hi,


My girl is Sec 3 next year. Her 2014 results are quite depressing. Looking for a recommended tutor or tuition agency in following subjects: Combined Science (Physics, Chemistry) and Math. We are staying in Central area. Any good recommendation will be greatly appreciated. Thanks!

Hi, please help in these 2 questions:


1) 7 rows of soldiers with 20 soldiers in each row were assembled on a parade square. The soldiers were spaced out equally to form the perimeter of the parade square. The number of soldiers on the length of the parade square was twice the number of soldiers on its breadth. How many soldiers were on each side of the rectangle?

2) I am a 2-digit number. I am a multiple of 4. When I am divided by 9, there will be a remainder of 6. When I am divided by 7, there will be a remainder of 5. Who am I?

Hi, can someone help in following 2 questions:


Q1: Which of the following statements about the organism (a picture of a frog is shown) below are correct?

A: It has many cells of various shapes and sizes
B: It has cells which contain nuclei that pass hereditary materials down
It has different cells to carry out different functions
Cell division takes place as it grows
E: It has some cells that are surrounded by cellulose walls

(1) A,B and C only
(2) A,B and D only
(3) A,B,C and D only
(4) A,C,D and E only

Answer key: (2). I thought the answer shoud be (3) since C is true?

Q2: Stephanie counted the number of plants and animals in her garden. Her findings are shown below:

Plants that grow on the ground : 10
Plants that grow on trees : 7
Grasshoppers : 5
Lime Butterflies : 6
Caterpillars of Lime Butterflies : 8

Based on above, which of the following statements are definitely true?

A: There are at least 3 populations of animals
B: There are more plants than animals in Stephanie’s garden
There are at least 2 populations of plants
There is only one garden community

(1) A only
(2) B and C only
(3) C and D only
(4) A,C and D only

Answer key: (4). Should the answer be (3) since caterpillars of lime butterflies and lime butterflies should be counted as 1 population?

Hi, what is the best and easiest approach to tackle part (c) of this question:


http://i49.tinypic.com/jq6eck.jpg

Hi MathIzzzFun,


Thank-you for the answer

Hi, please help in this question:

Ans: (a) 138.06 cm2; (b) 83.91 cm

http://i50.tinypic.com/21kksw6.jpg

Hi, please also help in this question:


Tracy counted the number of 10c coins and 50c coins in her piggy bank. The number of 10c coins was 24 more than the number of 50c coins. After spending 3/5 of the 10c coins, 1/4 of the 20c coins and 18 50c coins, she had an equal number of 10c and 20c coins. The number of 50c coins now formed 40% of the remaining number of coins.
(a) How many 10c coins did Tracy have at first (Ans: 90)
(b) How much did she spend in all? (Ans: $16.80)

Hi 2cor41618,


I finally figure out:) Thanks so much!

Hi 2cor41618,


Could you explain how you derive:
B+C=7 litres
A+C=5 litres
A+B=3 litres ?

Best Wishes

Hi Tianzhu, the answer given was 7.5 litres.