Real Number-Basic

In a classroom, every student is assigned a unique roll number. Which type of number does each student's roll number represent?

• Natural number

• Rational number

• Whole number

• None of these

• Rational number

• Irrational number

• Integer

• None of these

Which of the following is an irrational number?

• 2

• 0.5

• √2

• 4/3

Which of the following is not a natural number?

• 0

• 1

• 2

• -1

The product of a rational number and an irrational number is a/an

• Rational number

• Irrational number

• Integer

• None of these

HCF of the smallest prime number and greatest two digit composite number is

• 2

• 1

• does not exist

• None of these

• 40500

• 90

• 30

• None of these

For any two given natural numbers a and b, HCF(a,b) x LCM(a,b) is

• ab

• a

• b

• None of these

If p is a prime number, then LCM of p and p+1 is

• p

• 1

• p(p+1)

• None of these

• Rational number

• Irrational number

• Integer

• None of these