(2/7)3 × (2/7)5 ÷ (2/7)7 =
7/2
2/7
49/2
14/4
Two rational numbers a/b and c/d are equal iff ______.
ad = bc
ac = bd
ab = cd
None of these
Rationalise the denominator of 3/√5.
3
3√5/5
3/√5
3√5
If a and b are two positive numbers such that ab is not a perfect square then an irrational number between a and b is ______.
(a+b)/2
ab
√(a+b)
√ab
Express as a rational number as _________.
53/99
8/15
5/22
47/90
5 - 3√2
The reciprocal of (-2/5)3 = ___________
-8/15
125/8
-125/8
For any rational number a, ao =
0
1
a
<
>
=
None
The sum of two rational numbers is ______.
A rational number
A real number
Irrational number
