Sir 21 is not a prime number
Question
The length and breadth of a rectangular Park are 75 M and 60 M respectively what is the ratio of the length to the breadth of the park
Let p be a prime number. If p divides a2, then p divides a where a is a positive integer.
An urn contains 12 white balls and 8 red balls. Two balls are to selected in succession,at random and without replacement. What is the probability that both balls are white
