# Blog

## Probability Questions: A Level TYS Answers

Find the worked solutions for past A Level probability questions. Probability questions are found in paper 2.

## Permutation and Combination Questions: A Level TYS Answers

Find the worked solutions for past A Level permutation and combination questions. Permutation and combination questions are found in paper 2.

## Use of Ti 84 for normal distribution

We talk about the graphic calculator Ti-84 for normal distribution in this post. We’ll look at normal distribution functions in Ti-84: invNorm and normcdf.

## Use of Ti 84 for binomial distribution

We talk about the graphic calculator Ti 84 for binomial distribution in this post. We’ll look at 2 binomial distribution functions in Ti 84.

## A Level Math Statistics Questions – Past Year Papers by Topics

In this post, you will find the 2017 to 2022 H2 A Level Math statistics questions arranged by topics. Click on the topic to see the questions.

## H2 A Level Math Statistics – Summary of Formulae

Find a summary of A Level Math Statistics in this post here. We go through key concepts on all topics tested in H2 A Level Math Statistics.

## Proving Trigonometry Identity for O Level Additional Mathematics

Proving Trigonometry Identity Proving trigonometry identity is a common type of questions often tested In O Level Additional Mathematics. To prove an identity, students are…

## Learning About Haber Process – O Level Chemistry

Haber process is the industrial process used for the manufacture of ammonia from hydrogen and nitrogen with iron as the catalyst.

## Drawing Dot-and-Cross Diagrams of Ionic Compounds – O Level Chemistry

In this post, let’s look at examples of dot-and-cross diagrams of ionic compounds for O Level Chemistry. Specifically, we will only be drawing the dot-and-cross…

## Mole Concept and Stoichiometry – Formulae for O Level Chemistry

In this post, you will find a summary of all the mole concept and stoichiometry formulae you’ll need for your O Level Chemistry exams.

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