Question

Choose the correct option
Q1-For positive real numbers a and b
A.√ab =√a√b B.(a+√b)(a-√b)=a²- b
C.√a/b =√a/√b D.(√a+√b)(√a - √b)=a+b
Q2-Out of the following,the irrational number is
A. 1. infinte 5 B. 1.2 infinte 77
C. pie D. 2.4 infinte 77
Q3-To rationalise the denominator of 1/√a+b,we multiply this by
A. 1/√a+b B.√a-b/√a-b
C. 1/√a+b D.√a+b/√a+b
Q4-The number of rational numbers between √3 and √5 is
A.one B.3
C.none D.infinitely many
Q5-If we add two irrational numbers,the resulting number
A.is always an irrational number B.is always a rational number
C.may be a rational or an irrational number D.always an integer
Q6-the rationalising factor of 7-2√3 is
A.7+2√3 B.7-2√3 C.4+2√3 D.5+2√3
Q7-If 1/7=0.infinte 142857,then 4/7 equals
A.0.infinte 428571 B.0.infinte 285718 C.0.infinte 857142 D.0.infinte 571428
Q8-The value of n for which √n be a rational number is
A.2 B.4 C.3 D.5
Q9-3√12/6√27 equals
A.1/2 B. √3 C.1/3 D. √2
Q10-(3+√3)(3-√2) equals
A.9-5√2-√6 B.9-√6 C.3+√2 D.9-3√2+3√3-√6
Q11-The arrangement of √2, √3, √5 in ascending order is
A.√2, √3, √5 B. √5, √3, √2 C. √2, √5, √3 D. √3, √2, √5
Q12-If m and n are two natural numbers and mⁿ=32,then nᵐⁿ is
A.5²
B.5³
C.5¹⁰
D.5¹²
Q13-If √10=3.162,then the value of 1/√10 is
A.0.3162
B.3.162
C.31.62
D.316.2
Q14-If (3/4) ⁶ * (16/9)⁵=(4/3) ˣ⁺²,then the value of x is
A.4
B.-2
C.2
D.6

Answer 1

1. A
2.C
3.B
4.D
5.A
6.A
7.D
8.B
9.C
10.D
11.A
12.C
13.A
14.C
hope it helps
marks a brainliest plz