alleryStart learning →Which of the following numbers is irrational?
ASquare root of 121
BSquare root of 9/16
CSquare root of 2.25
DSquare root of 0.2
Answer & Solution
Correct answer: D. Square root of 0.2
sqrt0.2 = sqrt(1/5) is not a ratio of integers, while the other three equal 11, 3/4 and 1.5.
Keep practising Basic Algebraic Identities and Elementary Surds
Browse all Basic Algebraic Identities and Elementary Surds questions for SSC CGL, or explore more Quantitative Aptitude topics.
Related questions
The number zero is the square of how many real numbers?How many real numbers have a square equal to 49?A square of a real number x is less than x exactly when x lies in which range?What is the product of sqrt2 and sqrt8?The order of the surd fifth root of 7 is what?Which of these is a surd?Which is greater: sqrt3 or the cube root of 5?Which of these three numbers is the largest: sqrt2, cube root of 3, fourth root of 5?