Nutrition

LCM and HCF are two of the most tested concepts in school maths. Learn the prime factorization method, the fast division shortcut, and where these numbers actually show up in real life.

A blood pressure reading of "120/80" means nothing until you know the categories. Here is the full AHA chart, how ranges shift with age, and when a number becomes an emergency.

A BMI of 25 is "overweight" for a Western adult, but research shows South Asians carry significantly more body fat at the same BMI — and face higher metabolic risk. The WHO recognises lower BMI thresholds for Asians. Here is what the research says and why it matters.

"Drink 8 glasses a day" is everywhere — but it has no scientific basis. Your actual water needs depend on your body weight, activity level, climate, and diet. Here is the formula and a table that tells you your exact target.

The BMI scale classifies weight from underweight to obese — but what counts as healthy varies by age and sex. This guide explains the WHO chart, what your number actually means, and the well-documented limitations of BMI as a health measure.

TDEE is the total number of calories your body burns in a day — at rest and through activity. It is the master number behind every effective diet and fitness plan. This guide explains how TDEE is calculated and why it matters more than BMR alone.

The answer to "how many calories per day" is not the same for everyone. Your TDEE — Total Daily Energy Expenditure — depends on your weight, height, age, sex, and activity level. Here is the exact formula and tables by goal.