1.If the numerical value of the volume of a right circular cylinder and its curved surface area are equal, then its radius is (2)
(a) 2 units
(b) 4 units
(c) 3 units
(d) 6 units
2.If (3x -y) : (x + 5y) = 5 :7, then the value of (x + y) : (x – y) is (1)
(a) 3 : 1
(b) 1 : 3
(c) 2 : 3
(d) 3 : 2
3.The number of times 2 is used while writing the numbers from 1 to 100 is (1)
(a) 21
(b) 20
(c) 19
(d) 18
4. If 0.38 x 7.2 = 2.736, then 38 x 0.0072 is (4)
(a) 2736
(b) 0.2736
(c) 27.36
(d) 273.6
5. If the product of two numbers is 2160 and the HCF is 6, then the ratio of HCF and LCM is (3)
(a) 21 : 60
(b) 60 : 21
(c) 1 : 60
(d) 60 : 1
