Q1.
0(zero) is a rational numbers.
(a) yes (b) no (c) can't say
Solution.
(a) yes
Rational number is p/q , q ≠ 0
(0/1 = 0)
Solution
Q2.
9n - 3n is divisible by
(a) 6 (b) 7 (c) 8 (d) 4
Solution.
(a) 6
Solution
Q3.
Find the value of x.
√x + 38 = √2304
(a) 70 (b) 80 (c) 100 (d) 90
Solution.
√x + 38 = 48
√x = 10
x = 100
Solution
Q4.
Find the value of 
(a) 6 (b) 9 (c) 8 (d) 7
Solution.
(a) 6
Solution
Q5.
Which is the largest number.
(a) 31/3 (b) 51/5 (c) 21/2 (d) 71/7
Solution.
(a) 31/3
take the LCM of 3,5,2 and 7 = 210
Solution
Q6.
5n - 5 is divisible by
(a) 2 (b) 3 (c) 4 (d) 5
Solution.
(c) 4
Solution
Q7.
1200 of 39/55 of 11/13 of 1/5 = 500 - x.
Find x
(a) 660 (b) 960 (c) 400 (d) 356
Solution.
1200 x 39/55 x 11/13 x 1/5 = 500 - x
1200 x 3/5 x 1/5 = 500 - x
144 = 500 - x
x = 500 - 144
x = 356
Solution
Q8.
If 8% of x is equal to 4% of y, 20% of x is.
(a) 50% of y (b) 10% of y (c) 20% of y (d) 5% of y
Solution.
8% of x = 4% of y
8x/100 = 4y/100
y = 2x
20x/100 = 20/100 x y/2
= 10y/100
= 10% of y
Solution
Q9.
A triangle has 600 cm2 Area, its sides are in ratio 3:4:5, find the hypotenues of the triangle .
(a) 10 cm (b) 50 cm (c) 40 cm (d) 30 cm
Solution.
Area of triangle = 1/2 x base x height
(1/2) x (3x) x (4x) = 600
8x2 = 600
x2 = 100
x = 100
x = 10
5x = 5 x 10 = 50cm
Solution
Q10.
Find the ratio of Area of square and equilateral triangle, both have side a.
(a) √3 : 2 (b) 1:√3
(c) 4:√3 (d) 2:√3
Solution.
a2 : (√3/4) a2
4:√3
Solution
