Sets

Let S be the set of the first 11 natural numbers. Then the number of elements in A = \B S : n(B) 2 and the product of all elements of B is even\ is .

Let A = \x : |x2 - 10| 6\ and B = \x : |x - 2| > 1\. Then

1. A B = (- , 1] (2, )
2. B - A = (- , -4) (-2, 1) (4, )
3. A - B = [2, 3)
4. A B = [-4, -2] [3, 4]

Let A = \( , ) R R : | - 1| 4 and | - 5| 6\ and B = \( , ) R R : 16( - 2)2 + 9( - 6)2 144\. Then

1. A B
2. B A
3. neither A B nor B A
4. A B = \(x, y) : -4 x 4, -1 y 11\

Let A = \1, 6, 11, 16, \ and B = \9, 16, 23, 30, \ be the sets consisting of the first 2025 terms of two arithmetic progressions. Then n(A B) is

1. 3814
2. 4003
3. 4027
4. 3761