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Permutation and Combination Concept

by | Jun 7, 2025 | Uncategorized

1. Permutation & Combination(i) Introduction of Selection/Combination(ii) Number of ways of selecting ‘r’ articles from ‘n’ distinct article(iii) Number of ways of selecting ‘r’ articles from ‘n’ distinct articles if...

AP GP and HP

by | Jun 7, 2025 | Uncategorized

AP, GP & HP Arithmetic Progression(AP):- AP is a series of numbers where the difference between any two consecutive terms is constant. This constant difference is called the common difference.Ex:-General form:  a, a + d, a + 2d, a + 3d, ……..till n...

Number of Zeroes Concept

by | Jun 6, 2025 | Uncategorized

Number of zeroes in an expression:- Zero will be formed when we multiply 2 and 510 = 2×5100 = 2²×5²1000 = 2³×5³10000 = 2⁴×5⁴So we can say that to have ‘n’ zeroes at the end of a product we need exactly ‘n’ combinations of 2 and 5. Number of...

Factors Concept

by | Jun 5, 2025 | Uncategorized

Factor Theory Concept ⇒ Consider a composite number n ⇒ n = aᵖbᑫcʳ………..where a, b, c are prime numbers & p, q, r are natural numbers.ThenNumber of factors of n is given...

Percentage Concept

by | Dec 3, 2024 | Uncategorized

Percentage:- The word ‘per cent’ means per hundred. Thus 9 percent means 9 parts out of 100 parts. This can also be written as (frac{9}{100}).Therefore percentage is a fraction whose denominator is 100, and the numerator of this fraction is called the Rate...