(2/7)3 × (2/7)5 ÷ (2/7)7 =
7/2
2/7
49/2
14/4
The lowest rationalising factor of 5√2 is _______.
5√2
5
2
√2
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
Rationalise the denominator of
3 + 2√2
1 +2√2
3 - 2√2
1 - 2√2
125 = _____________
53
54
55
None of these
(-3)4 = ______________
81
-18
12
-12
Express as a rational number as _________.
53/99
8/15
5/22
47/90
√3
√3 + √2
√3 - √2
Which of the following statement is false?
Every surd is an irrational number.
The sum of a rational and irrational number is always irrational
Every irrational number is a surd
The negative of an irrational number is always irrational.
((2/5)2)3 × (1/5)-4 × 5-1 × 1/4
23/53
24/53
24/52