
Convert decimals to fractions by multiplying by 100 for finite decimals and using the 100x minus x method for repeating decimals. The technique yields fractions like 365/99.
Learn to add and subtract fractions by finding a common denominator with the least common multiple, here 30, and perform multiplication and division using cancellation and reciprocals.
Explore divisibility rules for two, four, eight, three, nine, five, ten, eleven, seven, and twelve using last digits, digit sums, and the difference between sums of odd and even digits.
Divide a total value by a ratio, as shown with 3:4:5 and 24,000 to yield 6,000, 8,000, and 10,000, then combine ratios by equalizing terms.
Learn how to define percentage, compute it as obtained value divided by total value multiplied by 100, and use it to compare scores with practical examples.
Compute percentage change using (new minus old) divided by old times 100, with 350 to 450 marks. Convert percentages to fractions by dividing by 100, and back to percentages.
Master practical percent calculations and shortcuts for competitive exams through examples like 20% of 600, 39% of 700, 250% of 300, and 20% of 40% of 350.
Apply successive discounts of 30% and 40% to see the final price become 0.42 of the initial price; solve for the original price using a 100x baseline.
This lecture explains nonlinear data lacks inherent order and introduces weighted average, showing how to compute a class average using weights for boys, girls, and teachers, yielding 14.4 gauges.
Learn practical tricks for solving average problems using cricket scores and class weights, to quickly find missing values such as 70 runs and 51 kg.
Learn the near hundred square technique using base 100, where you add the difference from 100 and square that difference, keeping a two-digit second part with carries as needed.
Discover two practical multiplication techniques: technique 1 uses unit digits summing to ten to split products, and technique 2 uses the numbers' distance from a hundred to simplify calculations.
Technique 7 uses a line-based, pictographic method to multiply numbers by drawing lines and counting intersections in three parts, with carry adjustments for two-digit middle parts.
Explore division techniques using the cushioned and remainder method to compute quotients and remainders through long-division steps, with practical examples for competitive exams.
Explore digital sum techniques to quickly find the single-digit result by adding digits and using elimination to simplify addition, subtraction, multiplication, division, percentages, and other simplifications.
Hi,
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Intended Audience:
Audience of all Age Groups, who wants to add some smartness in their work by saving their time.
Students appearing for any Competitive exams who are planning to stay Ahead of others students and stay out of crowd.
People who is planning to cross their fellow students in Numbers by increasing their speed
In this Course you learn Number Theory with Whiteboard Videos and you will enjoy this course and your learning happens with fun.
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5. Here we don't teach but we train you to solve.
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