How many cows in a herd of 50 cattle are black?

1)There are 12 oxen in the herd.

2)Forty two percent of the animals are black.

What is the value of even integers? (1)3 < a < 21 (2)3√a is also an even integer.

If P is a positive number, what is 30% of P? (1)50% of (50 / P) is less than 10. (2)10% of (50 x P) is 225.

Is xy > 0 ? 1)x/y < 0 2)x + y < 0

If P is a cube of an integer and is between 5 and 100, what is the value of P? 1)P is odd. 2)P is the square of an integer.

What is the sum of A, B and C? (1)A, B and C are odd numbers. (2)The average of A, B and C is 5.

Is w an integer? 1)3w is an odd number. 2)2w is an even number.

Students in a school speak only English or only French or both the languages. How many students speak only English? 1)1/5th of the students in the school speak both English and French. 2)200 students in the school speak only French.

What is the area of the circle? 1)The radius of the circle is 5. 2)The circumference of the circle is 5π.

If the average of the marks obtained by three students of a class is 75, are the minimum marks obtained less than 50?

1)The highest marks obtained are 90.

2)One student has scored more than 75 marks.

Which employee got a bigger salary raise in absolute terms? 1)Jack got a 10% raise. 2)Mark got a 25% raise.