## Nostalgia Unchained: Revising Mathematics of School Times

Here is a poke to the lovers and non-lovers of Mathematics: You have to enjoy it or it will intimidate you, wink at you, mock you. That said, there is no end to the tasty nostalgia, your dreadful memories notwithstanding.

So here is a list of concepts that consumed all our childhood while trying to decrypt them, only for those silly grades. Boy, don’t we miss these!

## Pythagoras Theorem

a2 +b2 = c2

Definition: Pythagoras Theorem states that in any right-angled triangle, the area of the square of hypotenuse side (ages since we wrote the word hypotenuse) is equal to the sum of the areas of the squares of the smaller sides (the two sides that meet at a right angle).

Pythagorean was a magic door to solving the most complex problems of geometry, and learning it was apparently no effort. It was the sweetest realization ever when attempting a class test, you realized that the question with highest weightage was the one revolving around Pythagoras theorem.

## Algebra’s X & Y Equations

Consider this for a memorabilia:

Problem: Solve

Solution:  Factor.

(4x +3) (x-2) = 0

Using the principle of zero products, which says,

if ab = 0, either a, b, or both must be equal to zero.

4x+ 3 = 0,   x – 2 = 0

4x = -3    ,   x = 2

x = (-3/4) or x = -2

Don’t the above 8 lines bring back a whole Tsunami of memories? So, how many of you can still get through the question without tripping?

## Unitary Method

After warming up with counting from 1 to 100, Unitary Method was our first official date with Mathematics. And I wager, it was a not-so-interesting one. The grumbling apart, Unitary is one of those *few* concepts that still applies to the real, non-geeky world.

Mode and Mean, Sets

Now, here was a question in exams we seldom got wrong. Whilst finding medians was a cakewalk, the concept of Mode did require a bit of scratching around.

Integration and Differentiation

While df/dx was a no-brainer, ab always winked at me in ridicule. The fact that Integration was just a reverse of Differentiation sounded so easier said than done. Integration was endlessly compounding, with one equation leading to another and we never knew when we reached the final level of union.

Permutation and Combination

Inseparable names like Laurel and Hardy, Permutation and Combination goes about its business at a very lazy speed. No matter how easy you find solving problems with these methods, you would end up quitting mid-way.

Not sure how many second me, but it has been a while since we roamed this knotty territory. The nostalgia, however, refuses to shrug off.

Authored by Rohit Raina

### Rohit Raina

A writer by chance and leisurely on his way to become a writer by choice, Rohit is either ranting his ire out or talking about the most irrelevant stuff around.