The length of the sides of the right angled triangle are given in natural numbers.If two of these numbers are odd and they differ by 50, then least possible value of third side is
a)61 b)60 c)51 d)50
9 years ago A's age and B's age were in the ratio of 5:7. Which of the following cannot be the ratio of their ages five years from now:
a) 11/13 b)13:19 c)21.25 d)15:16
Give explanation