. Nikhilam navatascaramam Dasatah The formula simply means : “all from 9 and the last from 10” The formula can be very effectively...

Ekadhikena Purvena The Sutra (formula) Ekādhikena Pūrvena means: “By one more than the previous one”. i) Squares of numbers ending in 5 :...

✓MULTIPLYING WITH 15. Rule: Add one-half the first digit to itself to obtain the first answer digit (or digits). Continue this process...

✓FINDING 16-2/3% OF A NUMBER Rule: Divide the given number by 6. If the given number is odd, the answer will contain a fraction. See...

✓ADDING TWO FRACTIONS WHOSE NUMERATORS ARE BOTH 1. Rule: Write the sum of the denominators over the product of the denominators. The...

✓ADDING CONSECUTTVE NUMBERS. Rule: Add the smallest number in the group to the largest number in the group, multiply the result by the...

✓Method to multiply 2-digit number. (i)AB × CD = AC / AD + BC / BD 35 × 47 = 12 / 21 + 20 / 35 = 12 / 41 / 35 = 1645 (ii)AB × AC = A2 / A...

Geometry of polygons A polygon is, roughly speaking, any plane figure with straight sides. However, we have to be more precise than this:...

Geometry of straight lines. Angles on a straight line A straight angle is, by definition, the angle measuring two right angles, that is,...

MULTIPLYING TWO NUMBERS WHOSE DIFFERENCE IS SMALL EVEN NUMBER. Rule: Square the number midway between the two given numbers; then square...

MULTIPLYING TWO NUMBERS WHOSE DIFFERENCE IS 6. Rule: Square the number midway between the two given numbers and subtract 9. Example: 1....

SQUARING ANY NUMBER ENDING IN 1. RULE: First, square the number to the left to the units digit. Then double the number to the left of the...

MULTIPLYING TWO NUMBERS WHOSE DIFFERENCE IS 4. Rule: Square the number midway between the two given numbers and subtract 4. Naturally...

SQUARE ANY TWO DIGITS NUMBER. Rule: Square the tens digit and affix the square of the units digit to the result. If the square of the...

MULTIPLYING TWO NUMBERS WHOSE DIFFERENCE IS 2. Rule: Square the number between the two given numbers and subtract 1. This short cut is...

MULTIPLYING ANY TWO DIGITS NUMBER WHOSE DIFFERENCE IS 3. Rule: Square one more than the smaller number and add one less than the smaller...