# Rational Number

Topics: Real number, Irrational number, Rational number Pages: 4 (627 words) Published: May 27, 2013
LEVEL I

Q1) From the choices given below mark the co-prime numbers
a) 2,3 (b) 2,4 (c) 2,5 (d) 2,107

Q2) Given a rational number -5/9. This rational number can also be known as a) A natural number (b) a rational number
(c) a whole number (d) a real number

Q3) The square root of which number is rational
a) 7 (b) 1.96 (c) 0.04 (d) 13

Q4) 2 - √7 is
a) A rational number (b) an irrational number
(c) a real number (d) a natural number

Q5) To rationalize the denominator of the expression 1 , we multiply and divide by √7 - √6 a) √7 + √6 (b) √6 (c) √7 × √6 (d) √7

Q6) (125)-1/3 can be written as
a) 5 (b) -5 (c) 1/5 (d) none of these

Q7) Every point on the number line
a) can be associated with a rational number
b) can be associated with an irrational number
c) can be associated with a natural number
d) can be associated with a real number

Q8) If z2 = 0.04, then z represents a ____________ number.

Q9) The number of irrational numbers between 15 and 18 is infinite. True or False

Q10) Multiply 5√2 by 17

Q11) Give an example each of two irrational numbers, whose Sum, Difference, Product and Quotient is rational and irrational number.

Q12) Find two rational and irrational numbers between 0.5 and 0.55.

Q13) Represent -12/5 on the number line

Q14) Express 0.047 in the form p/q where p and q are integers and q≠0.

LEVEL II
Q1) Examine whether the following numbers are rational or irrational: i) (2-√3)2 ii) (√2+√3)2 iii) √3-1 √3+1 Q2) Express each of the following as...