Two numbers x and y (x y) are selected from the set of first 50 natural numbers. The number of ways of selectingthem such that 53.) xsquare-ysquare is divisible by 5 is(A) 470(C) 280(B) 425(D) 140 Q 54. x power4- ypower4 is divisible by 5 is(A) 470(C) 835(B) 235(D) 825

Two numbers x and y (x y) are selected from the set of first 50 natura

1.	Two numbers x and y (x y) are selected from the set of first 50 natural numbers. The number of ways of selectingthem such that 53.) xsquare-ysquare is divisible by 5 is(A) 470(C) 280(B) 425(D) 140 Q 54. x power4- ypower4 is divisible by 5 is(A) 470(C) 835(B) 235(D) 825
Answer» Two numbers x and y (x y) are selected from the set of first 50 natural numbers. The number of ways of selectingthem such that 53.) xsquare-ysquare is divisible by 5 is(A) 470(C) 280(B) 425(D) 140 Q 54. x power4- ypower4 is divisible by 5 is(A) 470(C) 835(B) 235(D) 825