Junior Cert - Functions

2 great clips for Ms Higgins' Junior Cert class to revise for homework.

Measuring Pi

Can you see where Pi = 3.14159265359 come from. Hint : look at diameter and circumference
Good luck
Mr Gilmartin

Leaving Cert Ordinary Level - Cosine Rule

Please watch clip below to help correct Question 18 of tonight's homework. ~Enjoy the weekend.
Mr Gilmartin

LC Ordinary level Sine Rule (2)

Basic Introduction to Trigonometry

Problem Solving - Puzzle 6 The Tricky Triangle

Can you get the triangle pointing downwards by just moving 3 coins? Spend some time trying to figure it out!

Watch the clip below to see how it's done.
Tricky Triangle Puzzle from Magh Éne College on Vimeo.

Problem Solving - Puzzle 7 Sticky Squares

Look at the image on the screen. There are 5 squares. The aim is to move 3 pieces of wood to leave 3 squares remaining. Good Luck!

Problem Solving - Puzzle 1

You have been given 9 weights, one of which is slightly heavier than the rest.

Can you work out which weight is heavier in just two weighings of the balance? 

Please click here to access animation of problem.

REVISION DAYS IN LYIT!

CLICK HERE TO COMPLETE ONLINE SURVEY.

 

THANKS!!

Leaving Cert Exam Supplement

An interesting read below for all you LCers!

http://www.irishtimes.com/polopoly_fs/1.1664075.1390387893!/menu/standard/file/Exam%20Times%20Maths%20Supplement.pdf

Good luck with the study!

Mr. Sweeney

Review of Leaving Cert Revision Days

Hi folks,

Would you mind filling out this questionnaire please? It will only take you a minute or two!

CLICK HERE

Many thanks,

Mr.Sweeney.

LC Ord Level - Trapedzoidal Rule

LC Ord.Level Area and Volume HW - 26/03

LC Homework - Area and Volume

LC Homework Area and Volume

Here are questions 12,14 and 16 for tonights homework
Best of Luck
Mr.Gilmartin

Rational and Irrational Numbers

Rational Numbers

A rational number is a number that can be written as a ratio. That means it can be written as a fraction, in which both the numerator (the number on top) and the denominator (the number on the bottom) are whole numbers.

• The number 8 is a rational number because it can be written as the fraction 8/1.
• Likewise, 3/4 is a rational number because it can be written as a fraction.
• Even a big, clunky fraction like 7,324,908/56,003,492 is rational, simply because it can be written as a fraction.

Every whole number is a rational number, because any whole number can be written as a fraction. For example, 4 can be written as 4/1, 65 can be written as 65/1, and 3,867 can be written as 3,867/1.

Irrational Numbers

All numbers that are not rational are considered irrational. An irrational number can be written as a decimal, but not as a fraction.

An irrational number has endless non-repeating digits to the right of the decimal point. Here are some irrational numbers:

π = 3.141592…

 = 1.414213…

Although irrational numbers are not often used in daily life, they do exist on the number line. In fact, between 0 and 1 on the number line, there are an infinite number of irrational numbers!

Enjoy,

Mr. Sweeney.

Junior Cert Maths - Probability

Good lesson on tree diagrams from Aoise and Katie

Junior Cert Maths - Congruent Triangles

Well done to Rozarah Glenane on this very informative clip on Congruent Triangles

$1,000,000 to be won!

Have a go at the puzzle below. There is a $1000000 prize!

http://www.cs.nuim.ie/courses/compthink/app2/scalesapp/index.php

Enjoy.

Mr.Sweeney

Number Systems

Have a look at the video below to figure out Rational and Irrational numbers!




Best of luck.

Mr.Sweeney

Injective, Surjective & Bijective

This may be of use to leaving certs when you are revising the functions!


 

Good luck. 

Mr.Sweeney.

Junior Cert Maths- Factorisation

Feet up on a Sunday evening !

Thanks

Many thanks for all the kind wishes, beautiful cards and presents that I got in the last few days. They are very much appreciated. 

 Mr. Sweeney.

Induction - Sample Solutions

Exam - Induction

Marking Scheme - Induction

Good luck with the study. Mr.Sweeney

Project Math Exam Papers and Solutions

Click here for papers and solutions thanks to themathtutor!

Induction

Please look at the following material when revising for induction.

Induction 1

Read more on induction here.

Good luck.

Mr.Sweeney

Problem solving

A student is given five random cards from a standard deck of 52 cards. He must choose four cards to reveal to his professor and the order in which to reveal them; his goal is to reveal four cards in such a way that the professor knows what the fifth hidden card is. How does he do this?