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Singapore Math

Showing posts with label calendar. Show all posts
Showing posts with label calendar. Show all posts

Monday, January 6, 2025

The Singapore Mathematics Calendar

Not Your Average Math Calendar!

Even if you’re not a tiger mum or dad, there is no better way to usher in the New Year, by blessing your child or a loved one with the quirky and colorful Singapore’s Maths Calendar 2025.

Literacy & Numeracy

Singapore’s locally published and printed “first of its kind” math calendar aims to kill two birds with a mathematical stone, by helping your little one become both literate and numerate in the shortest time.

With a new math question every day—the answer is the date on which the question is posed—offers a creative way for grades 1–2 (or primary 1–2) children to learn math, while having fun along the way.

Plus, the questions have been painstakingly set in such a way that they follow closely and timely the topics or concepts that are presented in the students’ MOE-approved textbooks and workbooks. Yes, even during the school holidays, calendar users’ daily mathematical diet is being taken care of.

Enrichment Math via Comics

With a monthly comic story that promotes biodiversity so that the younger generation would still have a planet to inhabit when they’ve their own children and grandchildren, Singapore Maths Calendar 2025 also aims to educate young readers about Singapore’s wildlife, while learning some fun facts about birds, mammals, reptiles, and sea creatures native to the island state.

Available at all major bookstores and local school bookshops

Publishing a Math Calendar

For aspiring mathepreneurs or seasoned math writers, who desire to produce a similar calendar for other grades or editions in 2026 and beyond, you might think twice or thrice before embarking on such a “deceptively easy” math project.

As I hinted earlier, as a writer, if you want to write a salable math title that would pay the bills (or one that might even help you retire prematurely), writing an assessment or supplementary math title has a higher chance of fulfilling your short- or medium-term goals than working on a [Singapore/Singaporean] math calendar.

At best, writing and publishing a math calendar might temporarily boost your ego, but based on my experience working on these tricky pet math projects, I’d recommend that you spend the man- or woman-hours producing a few no-frills assessment or problem-solving or recreational math titles instead—if you long for some decent royalty or pie-in-the-sky lump sum payment.

For the publisher, producing a math calendar, especially in ever-dwindling birth rate Singapore, the risks (and costs) are pretty high. For the writer, the much-longer time and oft-unappreciated effort needed to write a math calendar could be better spent teaching, tutoring, editing, or writing more salable or profitable assessment titles.

From a business standpoint, 98% of publishers would rather focus their energy and deploy their manpower on producing profitable titles than meeting the mathematical needs and wants (or satisfying the ego) of their calendar math writer. Moreover, from the editorial and production angles, churning out a math calendar could be frustratingly painful and technically challenging, compared to producing a typical assessment or supplementary title (or even an oft-ill-edited primary school textbook).

Count on Singapore! 

The Singapore Maths Calendar 2025 is not only a Christmaths gift for 6–8 year olds, especially those who’ve an ambivalent attitude towards the subject, but also an aha! souvenir for any traveler to the “fine” city of Singapore. An apt [nonboring] Singapore math gift to bless a loved one at home!

Be a part of the Singapore math diaspora, while having a good idea of the mathematical standard expected of most local students. The calendar’s must-do or must-practice math questions allows you to gauge your child’s level of mathematical proficiency vis-à-vis their counterparts in Singapore, where even their weaker students have so far fared better than the global average. 

For the price of two McDonald’s meals or less, with a yearlong supply of 365 routine and nonroutine math questions, plus 12 months of comics stories, there is probably no present Singapore math assessment title, enrichment or not, that offers the average or above-average student a wallet-friendly rich mathematical experience quite like the Singapore Maths Calendar 2025.

Trust not my words! See for yourself whether or not this math calendar-cum-assessment-book is worth a good educational investment for your child or homeschooler in 2025.

Bonus: A math problem a day could keep the tutor away!


Calendrically & mathematically yours

© Yan Kow Cheong, January 6, 2025.



Singapore Maths Calendar 2025 at Kinokuniya and Popular bookstores

Wednesday, October 31, 2012

Halloween Math


© 3vdesign.com
A decade ago, celebrating Halloween in Singapore was considered a foreign import among locals, just like it was with Valentine's Day a quarter century ago. Today, local community centers and tourist attractions like the Singapore Science Centre and Night Safari (which is part of the Singapore Zoo), couldn't resist organizing their horrors nights to meet citizens' interest in the occult. As a result, many parents and teachers are faced with the dilemma as to whether to allow their children and students to participate in celebrations that had their roots in sorcery, witchcraft, and satanism.


© savagechickens.com
For the rest of us who teach teenagers, who often like to dabble in, or experiment with, things occultic or satanic, how can we make use of some symbolism of Halloween, such as black cats, snakes, and broomsticks, to teach some creative problem solving in mathematics? How can we bewitch or bedevil them with "dark math," by entertaining them with some "wicked thoughts" about the most disliked subject in school?


Below are a baker's dozen of dark math problems we could pose to kids, who could get an intellectual kick out of solving them. Who says math and fear can't positively mix? Didn't someone say that God created the natural numbers, and all the rest is the work of man—and of the devil?

© christmastimeclipart.com


1. Dracula's Pets

Count Dracula collected an even number of insects (beetles and spiders) in his coffin. He counted 54 legs in all. How many spiders did he have?



13 is a "Lucky" number!
© ps3trophies.com


2. Friday the 13th and Halloween

Look at the following pattern:

13 × 13 = 169 and 31 × 31 = 961

Is this a mere palindromic oddity?





3. The Fewest Number of Coffins in a Day

On which day of the year do fewest people die?

i-Coffin
© cartoonbarry.com

4. Cemetery Math

© 123rf.com
On a tombstone is written the following:

R.I.P
Jasper Rice
Died: 31/10/85
Buried: 30/10/85

If there was no error or crime involved, explain this apparently impossible situation, which took place in October 1985.  


5. The Secret Lives of Vampire Numbers

© christmastimeclipart.com

Numbers such as 1435 are called vampire numbers (or just vampires) because they are formed when two parent numbers (also called fangs), 35 and 41, are multiplied together (35 × 41 = 1435). Another vampire number is 2197, because it contains digits of its fangs, 27 and 81 (27 × 81 = 2187).

(a) Are there any two-digit vampire numbers?
(b) How many 4-digit vampires are there?



6. A Deadly Will 

A dead man's will states that seven bats were to be divided among his three ungrateful sons. The eldest was to receive one half of the bats, the middle one, one-fourth, and the youngest, one-eighth.

© holidaysville.com
The three wicked sons had nightmares as they couldn't inherit their shares without cutting bats into parts.

They sought the help of a wise priest who suggested that he would lend them one bat so that a “fair” allocation could be possible. The eldest son would then receive 1/2 × 8 = 4 bats, the middle one, 1/4 × 8 = 2 bats, and the youngest one, 1/8 × 8 = 1 bat. Thus, the sons would receive 4 + 2 + 1 = 7 bats, returning the borrowed bat to the holy man. Is the priest's solution “fair”?


© l3ak.com
7. Halloween Falls on a Frightday!

In a complete period of 400 years (after this, the calendar repeats another similar cycle), which day of the week is Halloween mostly likely to fall?


8. Legion's Number


In the Gospel of Mark, Jesus encounters a multitude of demons possessing a man. When the Son of Man asked them, "What is your name?" the man replies, "My name is Legion, for we are many."

The computer scientist, Clifford A. Pickover, defined the number 666⁶⁶⁶ as Legion's number of the first kind, and the number 666!⁶⁶⁶! as Legion's number of the second kind.

(a) What are the last 31 digits of 666!?
(b) What are the last ten digits of 666!⁶⁶⁶!?
(c) Using a computer, what are the last ten digits of 666⁶⁶⁶?

By definition, 666! = 1 × 2 × 3 ×⋯× 665 × 666


© www.coxandforkum.com

9. The Math of 9/11

Using the pattern and period of the calendar, and the day of the week September 11 falls this year, what day of the week was 9/11—the "Holy" 2001 War by the "fidels" on the Twin Towers?




The Pentagram
© werewolves.com
10. Is Phi Divine or Demonic?

An equation uniting the Number of the Beast 666 and the golden ratio ø is given by

ø = −{sin 666º + cos[(6)(6)(6)º]} 

Verify phi's apparent liaison with the satanic number.


11. A Grave Calculation

© hawaiidermatology.com


How long will it take before the whole 
world is covered in gravestones?

Hint: What is the total land area on Earth? 
How much area does each person's grave take up?




12. Triple 4 and Triple 6

The Chinese avoid the "death number" 444; the Westerners avoid the "satanic number" 666. The West like the number 7 and multiples of 7, while the East like even numbers but avoid odd numbers. In general, Asians' "lucky" numbers are Westerners' "unlucky" numbers.

Why do both the East and the West still have faith in numerology and astrology, in spite of literacy, numeracy, and technology?


© all4myspace.com
13. Santa versus Satan

It is said that Satan is a wolf in sheep's clothing: f(Santa) = Satan.

Prove that Oct. 31 = Dec. 25.



References

Pickover, C. A. (2002). The mathematics of Oz. Cambridge University Press.

Pickover, C. A. (1997). The loom of God: Mathematical tapestries at the edge of time. New York: London Plenum Trade.

Santos, A. (2009). How many licks? Philadelphia: Running Press.

Yan, K. C. (2011). CHRISTmaths: A creative problem solving math book. Singapore: MathPlus Publishing.


Selected Answers

1. 3 spiders and 5 beetles.
Spiders have 8 legs and beetles 6.
We need to solve 8s + 6b = 54 with s, b positive and s + b even.
Hence there are 3 spiders and 5 beetles.
The Fiery Pentagram
© shutterstock.com

3. On the same day that the fewest people are born—29 February.

4. The man dies on a Monday and his body was then flown across the International Date Line to a place where it was still Sunday for immediate burial.

5. (a) No 2-digit vampires exist.
(b) 7 four-digit vampires.

8. (a) They are all zeros.
The last digits of 666! are 0 because 510 and 210 both divide 666! The number 666! has well over 100 zeros.
(b) The last 10 digits of 666!⁶⁶⁶! are 0. 
(c) The last 10 digits of 666⁶⁶⁶ are 0,880,598,016.

Challenge: What are the first 10 digits of Legion's number of the second kind?

9. Tuesday.

11. More than a million years.
Hint: How many people die every year round the globe? 
Time taken = (Total area of the Earth) ÷ [(Number of dead people per year) × (Area per dead person)]

13. If "Oct." is the short form of "octal" and "Dec." for "decimal," then 31 (in base-8 notation) is equal to 25 (in base-10 notation): 31₈ = 25₁₀

© Yan Kow Cheong, October 31, 2012