Home Study Tips Helpful Mnemonics Cheat Sheet To Make Memorising For O-Ranges Simpler For You

Helpful Mnemonics Cheat Sheet To Make Memorising For O-Ranges Simpler For You

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O-Ranges require plenty of reminiscence work, which might be one of many hardest and most time-consuming challenges that you simply face once you’re learning on your exams. Even if in case you have mastered the talents and strategies, you’ll be able to’t apply them in your examination in the event you can’t memorise what you must.

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Utilizing mnemonics is a hack that’s typically adopted by college students from all world wide. You make memorisation simpler by forming tales or rhymes you could affiliate with what you must keep in mind. It can assist you to make sure that the knowledge you must memorise will likely be effortlessly caught in your head.

I’ve compiled a fast cheat sheet of mnemonics for the totally different O-Degree topics which might be going to be helpful for you.

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You would possibly already know a few of them, or you’ll be able to uncover new ones which might be going to ease your burden throughout your revision.


For English, spelling could be a wrestle for a lot of, particularly the generally misspelled phrases. It’s additional difficult for phrases with the identical sounds however is spelled in another way.

However I’ve bought simply the hack so that you can differentiate the spelling for some phrases which might be typically complicated for college kids.

A whole lot of college students have difficulties differentiating whether or not the phrase needs to be spelled with an ‘ie’ or ‘ei’ after they each sound the identical.

Examples of some phrases which might be spelled with:


  • Imagine
  • Perception
  • Thief
  • Obtain
  • Chief
  • Piece
  • Yield


  • Obtain
  • Deceive
  • Receipt
  • Ceiling
  • Conceit
  • Understand

When doubtful, all the time keep in mind the rule of thumb: “I earlier than E, besides after C”. Do you see it?

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Repeat this mnemonic everytime you’re spelling these phrases and you’ll by no means combine them up once more.

‘Principal’ or ‘precept’?

These two phrases sound the identical however have completely totally different meanings; one is your college principal, whereas the opposite is a perception or rule.

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When doubtful, do not forget that: “A principal is all the time a buddy.”

Since a pal is a buddy, do not forget that ‘principal’ refers back to the individual: your college principal.

Spelling ‘Vital’

One ‘C’, two ‘S’s? One ‘S’, two ‘C’s? Spelling ‘vital’ can nonetheless be very complicated for a lot of.

Simply keep in mind the outfit: “One Collar and Two Socks”. One ‘c’ and two ‘s’s!

Spelling ‘Exaggerate’

You would possibly nonetheless be spelling ‘exaggerate’ with just one ’G’. 

Bear in mind: “Goofy Greg cherished to magnify”. Spell ‘exaggerate’ with two ‘G’s!

Credit: Oxford Royale

Extra Arithmetic

Sum and Product of Roots

Other than needing to grasp the ideas, Extra Arithmetic additionally requires you to memorise plenty of formulation that you’ll want to make use of to resolve your issues, and so they can grow to be complicated.

One set of formulation that you must memorise is the sum and product roots. This set of formulation isn’t supplied within the given formulation sheet.

So what’s a simple solution to keep in mind how one can remedy for the sum and product of roots? Simba and Pica!

Simba: Sum of roots Is Minus B over A

Pica: Product of roots Is C over A

Credit score: Apex Math Tuition Singapore

Consider these two cute characters and also you received’t mess up the formulation anymore!

Elementary Arithmetic

Order of Operations

Photograph credit score: Miss Quinn Teaches

In the case of fixing a protracted, difficult math downside with many operations, you completely must know which operation to begin with.

For those who remedy within the mistaken order of operations, you’re going to get a very totally different reply.

The order of operations is among the fundamentals that you must get proper, or it would value you to lose pointless marks in lots of questions.

So, you’ll be able to simply memorise the order of operations by remembering “BODMAS”:

  • Brackets
  • Orders (Powers/Indices/Roots)
  • Division
  • Multiplication
  • Addition
  • Subtraction

Trigonometric Ratios

Trigonometric ratios are used lots in O-Degree Elementary Arithmetic the place you must keep in mind remedy for the lengths and angles in a triangle.

There are three lengths in a triangle:

  • Hypotenuse (the longest facet of the triangle)
  • Adjoining (the size adjoining/subsequent to the recognized angle, however not the hypotenuse)
  • Reverse (the size reverse the recognized angle)

Three trigonometric capabilities that can be utilized:

  • Sine (Sin)
  • Cosine (Cos)
  • Tangent (Tan)

These are sometimes used interchangeably, so how will you keep in mind use them respectively? By remembering “TOA CAH SOH” (Massive-Footed Lady in Hokkien):

Tangent angle = Opposite size over Adjacent size

Cosine angle = Adjacent size over Hypotenuse

Sine angle = Opposite size over Hypotenuse

This catchy phrase that’s very Singaporean will assist you to match the trigonometric ratios with no problem.


The 4 Most Generally Used Alkanes

Alkanes are a collection of saturated hydrocarbons (carbon and hydrogen). It’s a large part in chemistry that you’ll want to establish in your papers.

In O-Ranges, they may normally solely require you to memorise the primary 4, that are methane, ethane, propane, and butane.

There’s a very simple method so that you can keep in mind the order of those alkanes:

  • Methane (Megan)
  • Ethane (Eats)
  • Propane (Peanut)
  • Butane (Butter)

Reactivity Sequence of Metals

The reactivity collection is one other important listing that you must memorise, as chemistry is lots about reactions.

Completely different metals within the periodic desk have totally different reactivities and are positioned in an order.

You have to to know which of the metals will react first and so forth., because the questions will certainly check you on these.

You should utilize this easy sentence:

  • Potassium (Please)
  • Sodium (Cease)
  • Calcium (Calling)
  • Magnesium (Me)
  • Aluminium (A)
  • Zinc (Zebra)
  • Iron (As a substitute)
  • Tin (Inform)
  • Lead (Laura)
  • Hydrogen (How)
  • Copper (Copper)
  • Silver (Strengthens)
  • Gold (Gold)

Credit score: SimpleChemConcepts


Photograph Credit score: Biology On-line

Carbohydrates are natural compounds that may normally be damaged all the way down to launch power within the physique.

There are various kinds of carbohydrates: easy carbohydrates which have monosaccharides (easiest carbohydrates) and dissacharides (double sugars). There are additionally advanced carbohydrates that are lengthy chains of sugar molecules strung collectively.

You have to to know some examples of every of the forms of carbohydrates, and that is how one can memorise them:

Easy Carbohydrates: Monosaccharides

  • Glucose (Good)
  • Galactose (Lady)
  • Fructose (Buddy)

Easy Carbohydrates: Disaccharides

  • Maltose (My)
  • Lactose (Lazy)
  • Sucrose (Son)

Advanced Carbohydrates

  • Starch (So)
  • Glycogen (Good)


Electromagnetic waves

In accordance with The Financial Instances, electromagnetic waves “are created because of vibrations between an electrical area and a magnetic area.”

These are the forms of electromagnetic waves which might be organized from Lengthy Wavelength, Low Frequency, Brief Wavelength, Excessive Frequency.

  • Radio waves (Ruby’s)
  • Microwaves (Mom)
  • Infrared waves (Is)
  • Seen waves (Visiting)
  • Ultraviolet waves (Uncle)
  • X-ray (Xavier’s)
  • Gamma-ray (Backyard)

Relationship between Focal Size and Object & Picture distance, from a lens or mirror

To calculate the focal size, distance of object, or distance of picture, the formulation used is:

1/f = 1/do + 1/di

To recollect this formulation effortlessly, keep in mind “If I do, I die”, the place:

  • “f” = Focal size
  • “do” = Distance of Object
  • “di” = Distance of Picture

Credit score: Mnemonic Machine


The Seven Continents

One of many topic for Mixed Humanities is Geography. Understanding what the continents are is necessary! Don’t mistake continents for nations or states.

Right here’s how:

  • Europe (Eat)
  • Asia (An)
  • Africa (Apple)
  • Australia (As)
  • Antarctica (A)
  • North America (Nighttime)
  • South America (Snack)

Credit score: Seterra


A whole lot of topics within the O-Ranges are content-heavy and require reminiscence work to do effectively. It’s dangerous in the event you hope that your mind will magically keep in mind what you must keep in mind once you attempt to research simply by studying it time and again. 

I hope that the mnemonics that I’ve shared could be helpful for these taking the O-Ranges!

Do you’ve some other fascinating ways in which you used to memorise content material? Share with us within the feedback under!

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