model 1 basic number system Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (c)

The counting numbers {1, 2, 3, ...} are commonly called natural numbers; however, include 0, so that the non-negative integers {0, 1, 2, 3, ...} are also called natural numbers.

Natural numbers including 0 are also called whole numbers.

Also, Refer to Types of Numbers.

Answer: (b)

1) There exists the smallest natural number - which is 1. So, true.

2) There exists a largest natural number - there is no upper limit to numbers. So, false.

3) Between two natural numbers there is always a natural number - for example, between 1 and 2 there is no natural number. So, false.

Hence, only option 1 is true.

Answer: (b)

Both rational and irrational numbers taken together are called Real numbers.

Therefore, every real number is either a rational number or an irrational number. Hence, every rational number is a real number.

Hence, (B) is the correct option.

Answer: (d)

Pi ($π$) is an irrational number

π is an irrational number that has a value of 22/7 or 3.142…and is a never-ending and non-repeating number.

Irrational numbers are non-terminating

Answer: (c)