Fractions decimals basic concepts, arithmetic operations on fractions, conversion of fraction to decimal, rational irrational numbers, surds and more.
Highest Common Factor or HCF is the largest factor that divides two or more numbers under consideration. It is the largest among all the factors common to the set of numbers under consideration. The LCM is the smallest number that is divisible by the set of given numbers. In other words, LCM is the least common multiple of the set of given numbers...
Simple, quick and intelligent solutions of time distance problems in a few steps are explained using two selected time and distance MCQ problems.
In man hour work problems, if 8 men work for 3 hours, 24 man hours work amount is done. Then it is easy to say 4 men are needed to do same work in 6 hours.
Time and work unitary method, Time and work formula, Improved work rate technique for working together and Time and work with 3 variables solved.
Permutation and combination deal with choice and arrangement of a set of objects out of a second set of objects. Permutation deals with such questions as, how many ways can the three letters a, b and c be arranged? In each such permutation or arrangement, ordering is important. On the other hand, Combination deals with such questions as, how many ways can you choose a captain and vice-captain out of a cricket team of 11 players? In a combination, ordering of the elements chosen is not important...
Break up a number into its factors, just as you break up a complex problem into its component simpler sub-problems. Factorization is one of the most basic operations and is used extensively in other more important problem areas of HCF and LCM...
Numbers and arithmetic operations. Number system concepts and methods for solving number problems in competitive exams explained on test example problems. Exercise problems with answers for practice.
