Question

Which choice is an irrational number?
A 4π/π
B 2 6
C 18
D 21.989

Answer 1

1. correct answer B

Explanation:

because 2 surd 6 will continue to give you an infinite number which is an irrational number

Answer 2

Answer: The correct option is B) 2√6

explanation:

• a number is called irrational if it cannot be written in the form ,p/q where p and q are integers and q ≠0.
• a number is called rational if it can be written in the form ,p/q where p and q are integers and q ≠0.

A) 4π/π = 4 (This simplifies to 4, which is a rational number since it can be expressed as a fraction 4/1.)

B) 2√6 = irrational number (The square root of 6 cannot be simplified to a fraction or whole number, so it is an irrational number.)

C) 18 = rational number (This is a whole number and can be expressed as a fraction 18/1.)

D) 21.989 = rational number (This is a decimal number, but it can be expressed as a fraction, such as 21989/1000.)