Consider a triangle drawn on the X-Y plane with its three vertices at (41, 0), (0, 41) and (0, 0), each vertex being represented by its (X, Y) coordinates. The number of points with integer coordinates inside the triangle (excluding all the points on the boundary) is
Correct Answer : A
The digits of a three-digit number A are written in the reverse order to form another three-digits number B. If B > A and B - A is perfectly divisible by 7, then which of the following is necessarily true?
Let S be a set of positive integers such that every element n of S satisfies the conditions
1. 1000 ≤ n ≤ 1200
2. every digit in n is odd
Then how many elements of S are divisible by 3?
Let x=√4 + √4 - √4 + √4 - …. to infinity. Then x equals