Practice Book On Quicker Maths -

Below is a short, original piece written in the style of a preface + sample exercise section for such a practice book. “Quicker Maths” is not about skipping steps — it’s about choosing the shortest reliable path. In competitive exams, time is the real opponent. This practice book is designed for those who already know the basics but want to solve problems faster, cleaner, and with fewer errors.

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[ (100 + d)^2 = 10000 + 2 \times 100 \times d + d^2 ] Below is a short, original piece written in