Archive | June, 2017

2017 NMOS Special Round Training starts on 13 Jul (Thu)

28 Jun

The top scorers of the Preliminary Round (Click here for the name list.) will be invited to sit for a written paper in the Special Round at NUS High School of Mathematics and Science on 25th July 2017 (Tuesday) at 3.30 pm. The duration of the paper is 1h 30min and it consists of 20 questions (4 marks each for Q1-10, 5 marks each for Q11-20).

Some instructions useful to candidates of the Special Round:

1. Write your answers in the answer sheet provided and shade the appropriate bubbles below your answers.

2. No steps are needed to justify your answers.

3. No marks will be deducted for wrong answers.

4. Unanswered questions will not get any marks.

5. No calculators or mathematical instruments are allowed.

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Math Arena will be conducting NMOS Special Round Training for P4/P5 pupils invited to Special Round of NMOS 2017.298012_133585680077588_1435619466_n

Venue: Math Arena

(Tampines Street 45, Block 488B #B1-147, Singapore 521488) .

Bus 28 stops at Blk 489B ; Buses 28, 293 at Blk 489A ; Bus 29 stops at Dunman Secondary.

13 Jul (Thu)  7: 30 pm – 9: 30 pm

15 Jul (Sat)  4: 00 pm – 6: 00 pm

20 Jul (Thu)  7: 30 pm – 9: 30 pm

22 Jul (Sat)  4: 00 pm – 6: 00 pm

Course Fee: $320

Pupils who join the full course (all 4 sessions) will be entitled to these privileges:

  1. $20 Discount Voucher for this Special Round Training for current Math Arena semester 1 & 2 pupils only
  2. $20 Discount Voucher for 2017 Year End Holiday Program: P6 Fusion Math (full course)
  3. $30 Discount Voucher for school syllabus maths mentoring sessions in semester 2 of 2017

No make-up lesson will be arranged.

This course will mainly cover selected high-order thinking skill questions from the following topics:

1. Number Theory, Factors, Multiples & Divisibility

2. Rate & Speed

3. Geometry (Angles, Area & Perimeter)

4. Combinatorics & Cryptarithmetic Puzzles

Our Opening Hours (School Term):

Monday to Friday 3.30 pm to 9.30 pm

Saturdays 9.30 am to 5.30 pm

Closed on Sundays & Public Holidays

Should you have any enquiry regarding time schedule or course registration, please feel free to call us during opening hours at 6783 3218, 6781 9325 or WhatsApp to 8121 6628, or simply email to us at admin@matharena.com.sg.

2016 NMOS Statistics (nationwide):

Gold – 85 ; Silver – 357 ; Bronze – 762

HM – 965 ; COP – 3276 (Total – 5445)

Invited into Special Round – 373 (6.9%); Gold in Special Round – 85/373 (22.8%)

Mentoring Season 2: Get Ready to Ace your Prelims!

27 Jun
JUL AUG SEP OCT
3 (Mon) 1 (Tue) (7:30pm only) 1 (Fri) Hari Raya Haji 2 (Mon) Sci Sprint
4 (Tue) 2 (Wed) 2 (Sat) 3 (Tue)
5 (Wed) 3 (Thu) 4 (Wed)
6 (Thu) 4 (Fri) 4 (Mon) (7:30pm only) 5 (Thu)
7 (Fri) 5 (Sat) 5 (Tue) 6 (Fri)
8 (Sat) 6 (Wed) (7:30pm only) 7 (Sat)
  7 (Mon) 7 (Thu) (3:30pm not available)
10 (Mon) 8 (Tue) 8 (Fri) (3:30pm not available) 9 (Mon)
11 (Tue) 9 (Wed) National Day 9 (Sat) 10 (Tue)
12 (Wed) 10 (Thu) 11 (Wed)
13 (Thu) 11 (Fri) 11 (Mon) 12 (Thu)
14 (Fri) 12 (Sat) 12 (Tue) 13 (Fri)
15 (Sat) 13 (Wed) 14 (Sat)
  14 (Mon) 14 (Thu)
17 (Mon) 15 (Tue) 15 (Fri) 16 (Mon)
18 (Tue) 16 (Wed) 16 (Sat) 17 (Tue)
19 (Wed) 17 (Thu) 18 (Wed) Deepavali
20 (Thu) 18 (Fri) 18 (Mon) 19 (Thu)
21 (Fri) 19 (Sat) 19 (Tue) 20 (Fri)
22 (Sat) 20 (Wed) 21 (Sat)
21 (Mon) 21 (Thu)
24 (Mon) 22 (Tue) 22 (Fri) 23 (Mon)
25 (Tue) 23 (Wed) 23 (Sat) Math Sprint 24 (Tue)
26 (Wed) 24 (Thu) 25 (Wed)
27 (Thu) AMC 25 (Fri) 25 (Mon) Sci Sprint 26 (Thu)
28 (Fri) 26 (Sat) 26 (Tue) Math Sprint 27 (Fri)
29 (Sat) 27 (Wed) 28 (Sat)
28 (Mon) 28 (Thu)
31 (Mon) 29 (Tue) 29 (Fri)
30 (Wed) 30 (Sat)
31 (Thu)    

Mon

3:30 – 5:00 pm (Pri & Sec Math)

7:30 – 9:00 pm (Sec Math)

Tue

5:00 – 6:30 pm (Pri Math & Sci, Sec Math & Sci)

7:30 – 9:00 pm (Pri & Sec Math)

Wed

3:30 – 5:00 pm (Pri Sci, Sec Math & Sci)

7:30 – 9:00 pm (Pri Math)

Thu 

3:30 – 5:00 pm (Pri Math & Sci, Sec Math & Sci)

5:00 – 6:30 pm (Sec Math & Sci)

7:30 – 9:00 pm (Sec Math)

Fri

3:30 – 5:00 pm (Pri & Sec Math)

5:00 – 6:30 pm (Pri & Sec Math)

7:30 – 9:00 pm (Sec Math & Sec Bio)

Sat

2:00 pm – 3:30 pm (Pri Math)

4:00 – 5:30 pm (Pri Math)

Privileged Fee:

Math Arena current (semester) pupils only**: $35 x 3 sessions (min. 3 sessions per semester) = $105

**Subjected to Math and/or Sci full-course enrolment in 2nd Semester

Math Arena current P5 Heuristic & PSLE Maths A* Achievers pupils can utilise their $30 LearnBrill voucher (before 30-Nov 2017) to off-set mentoring fee for syllabus maths mentoring sessions only (subject to the above schedule). Enquire with us.

Regular Fee:

$55 per session for Primary level school syllabus maths or science

$60 per session for Secondary level school syllabus maths or science

$65 per session for JC H1/H2 school syllabus maths

Prior arrangement & confirmation by payment ONLY.

Email us >> admin@matharena.com.sg or WhatsApp to 8121 6628 to sign up. Other terms and conditions apply.

Note: * The final available date for mentoring:

Sec Math & Sci – 21 Oct (Sat)

P2,3,4,5 Math & Sci – 28 Oct (Sat)

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*Mentoring Sessions Available during PSLE Marking Exercise: 19 Oct to 24 Oct

Thu 19 Oct

2:00 – 3:30 pm (Pri Math & Sci, Sec Math)

7:30 – 9:00 pm (Pri & Sec Math)

Fri 20 Oct

2:00 – 3:30 pm (Pri Math & Sci, Sec Math)

3:30 – 5:00 pm (Pri & Sec Math)

5:00 – 6:30 pm (Pri & Sec Math)

7:30 – 9:00 pm (Pri Math & Sci, Sec Math & Sec Bio)

Sat 21 Oct

9:30 – 11:00 am (Pri & Sec Math)

11:30 am – 1:00 pm (Pri Math)

2:00 pm – 3:30 pm (Pri Math)

4:00 – 5:30 pm (Pri Math)

Mon 23 Oct

2:00 – 3:30 pm (Pri Math & Sci)

3:30 – 5:00 pm (Pri Math)

7:30 – 9:00 pm (Pri Math & Sci)

Tue 24 Oct 

2:00 – 3:30 pm (Pri Math & Sci)

3:30 – 5:00 pm (Pri Math)

5:00 – 6:30 pm (Pri Math)

7:30 – 9:00 pm (Pri Math & Sci)

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Updated as at: 17 Oct 2017

Strong and Weak Acids have Different Reaction Rates

15 Jun

Magnesium will react with an acid and make hydrogen gas. The more concentrated the acid, the faster the magnesium will react and you will see bubbles of hydrogen being produced more quickly.

A strong acid and a weak acid of the same concentration will react at different rates with the same metal.

More Here with examiner tips.

https://chemistrynotesblog.wordpress.com/2017/06/07/strong-and-weak-acids-have-different-reaction-rates/

Limiting Reactants – A Worked Example

4 Jun

Zinc reacts with dilute hydrochloric acid according to the equation:

Zn (s) + 2HCl (aq)      ->       ZnCl2 (aq) + H2 (g)

If 0.05 mole of zinc was added to 0.075 mole of hydrochloric acid,

(a)        identify the limiting reactant;

(b)       calculate the amount (in moles) of the excess reactant which remained unreacted;

(b)       calculate the amount (in moles) of zinc chloride formed.

Solution :

See Here