[{"id":19703,"question":"For any set X, X∪X is","choices":[{"text":"15","value":"A"},{"text":"15i","value":"B"},{"text":"-15i","value":"C"},{"text":"-15","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":19702,"question":"What is the conjugate of -7 -2i ?","choices":[{"text":"-7 + 2i","value":"A"},{"text":"7 + 2i","value":"B"},{"text":"7-2i","value":"C"},{"text":"√53","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":19701,"question":"If Z<sub>1</sub> = √-36, Z<sub>2</sub>=√-25, Z<sub>3</sub>= √-16, then what is the sum of Z<sub>1</sub>, Z<sub>2</sub> and Z<sub>3</sub> ?","choices":[{"text":"√3 I","value":"A"},{"text":"√7","value":"B"},{"text":"-2-1","value":"C"},{"text":"√5","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":19700,"question":"If Z<sub>1</sub> = 1+i, Z<sub>2</sub> = 2+3i, then |Z<sub>2</sub>-Z<sub>1</sub>|=?<br>","choices":[{"text":"√3 I","value":"A"},{"text":"√7","value":"B"},{"text":"-2-1","value":"C"},{"text":"√5","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":19699,"question":"If Z= (1,2). tjem Z<sup>-1</sup> = ?","choices":[{"text":"(0.2, 0.4)","value":"A"},{"text":"(-0.2, 0.4)","value":"B"},{"text":"(0.2, -0.4)","value":"C"},{"text":"(-0.2, -0.4)","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":19698,"question":"The value of x, and y, when (x+iy)<sup>2</sup>=5+4i","choices":[{"text":"X=2, y=-1","value":"A"},{"text":"X=-2, y=1","value":"B"},{"text":"X=2, y=-i","value":"C"},{"text":"X=2, y=2","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":19697,"question":"π/3 is","choices":[{"text":"A positive integer","value":"A"},{"text":"A negative integer","value":"B"},{"text":"A natural number","value":"C"},{"text":"An irrational number","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":19696,"question":"Every prime number is also","choices":[{"text":"Rational number","value":"A"},{"text":"even number","value":"B"},{"text":"Irrational number","value":"C"},{"text":"multiple of two numbers","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":19695,"question":"3/2 is","choices":[{"text":"An irrational number","value":"A"},{"text":"Whole number","value":"B"},{"text":"A positive integer","value":"C"},{"text":"A rational number","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":19694,"question":"√23 is","choices":[{"text":"A rational number","value":"A"},{"text":"A irrational number","value":"B"},{"text":"An even integer","value":"C"},{"text":"A factor of 36","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":19693,"question":"6 is","choices":[{"text":"A prime integer","value":"A"},{"text":"An irrational number","value":"B"},{"text":"A rational number","value":"C"},{"text":"A odd integer","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":19692,"question":"0 (zero) is","choices":[{"text":"A irrational number","value":"A"},{"text":"A rational number","value":"B"},{"text":"A negative integer","value":"C"},{"text":"A positive number","value":"D"},{"value":"E"}],"correctAnswer":2}]