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1. Concept of percentage : Percent implies “for every hundred” and the sign % is read as percentage and x % is read as x per cent. In other words, a fraction with denominator 100 is called a per cent. For example, 20 % means 20/100 (i.e. 20 parts from 100). This can also be written ...
1. Factor and Multiples : Factoring is like taking a number apart. It means to express a number as the product of its factors. Factors are either composite numbers or prime numbers (except that 0 and 1 are neither prime nor composite). The number 12 is a multiple of 3, because it can be divide...
1. a km / hr = (a * 5/18) m/s. 2. a m / s = (a * 18/5) km / hr. 3. Time taken by a train of length / meters to pass a pole or a standing man or a signal post is equal to the time taken by the train to cover 1 meters. 4. Time taken by a train of length / meters to pass a stationary obje...