Number Systems

The decimal expansion of an irrational number is

1. Terminating
2. Non-terminating and recurring
3. Non-terminating and non-recurring
4. Whole number

Which of the following is a whole number?

1. -2
2. 0
3. -7
4. -1

Which set contains both rational and irrational numbers?

1. {2, 5, -3}
2. {√2, π, √5}
3. {1/2, √3, 7}
4. {0.25, 4/5}

Which of the following numbers lies between 2 and 3?

1. √3
2. √5
3. √10
4. √16

Which of the following fractions has a terminating decimal expansion?

1. 3/14
2. 5/12
3. 9/40
4. 7/18

Which of the following represents an irrational number?

1. √49
2. √36
3. √50
4. √64

Which of the following is NOT a real number?

1. √16
2. √9
3. √-4
4. -5

Which of the following decimal numbers is recurring?

1. 0.5
2. 0.25
3. 0.333...
4. 0.125

Which of the following numbers is a perfect square?

1. 18
2. 20
3. 25
4. 27

The decimal expansion of 7/20 is

1. Non-terminating and recurring
2. Non-terminating and non-recurring
3. Terminating
4. Irrational

Which of the following numbers is an irrational number?

1. 3/5
2. 0.25
3. √7
4. -8