22018.The arithmetic mean of 10 numbers is -7. If 5 is added to every
number, then the new arithmetic mean will be
number, then the new arithmetic mean will be
-2
12
-7
-12
22022.The median of the following data
$\dfrac{3}{4}, \dfrac{1}{2}, \dfrac{2}{3}, \dfrac{1}{6}, \dfrac{7}{12}$ is
$\dfrac{3}{4}, \dfrac{1}{2}, \dfrac{2}{3}, \dfrac{1}{6}, \dfrac{7}{12}$ is
$\dfrac{3}{4}$
$\dfrac{7}{12}$
$\dfrac{2}{3}$
$\dfrac{1}{6}$
22024.The present value of a television is Rs. 14,580. If the value of the television depreciates at the rate of 10% every year, then the value of the television 3 years ago was
Rs. 18,950
Rs. 16,200
Rs. 20000
Rs. 18000
22026.The sides of two similar triangles are in the ratio of $\sqrt{3}$: 2. Then their areas are in the ratio of
$\sqrt{3}$ : 4
3: 4
3:2
4:3
22042.If $\alpha$, $\beta$ are the roots of $x^{2}$ -px + q = 0, then the value of $\dfrac{\alpha^{2}}{\beta}$ + $\dfrac{\beta^{2}}{\alpha}$
$\dfrac{q^{3}-3pq}{q}$
$\dfrac{p^{3}-3p}{q}$
${p^{3}-3pq}$
$\dfrac{p^{3}-3pq}{q}$
22044.The arithmetic mean of a group of 20 observations was calculated as 12.5. It was later found that one observation was wrongly read as -15 instead of 15. Then the correct mean is
13
14
12
14.5
22048.In a problem on division, dividend is 1261, Divisor is half the quotient, remainder is 11. Then the divisor is
20
25
35
45
22050.If x+1 is a factor of ax$^{4}$ + bx$^{3}$+ cx$^{2}$ + dx + e, then which one of the following is true?
a + c + e = b + d
a + b = c-d
a + b + c + d + e = 0
a + c + b = d + e
22052.$(px + q)^{3}$ –$ (px - q)^{3}$=
2px($p^{2}x^{2}+3q^{2}$)
2q($p^{2}x^{2}+q^{2}$)
2px(px+q)
2$p^{2}x^{2}(px+q^{2}$)
22054.Three metallic cubes of sides 3cm, 4 cm and 5cm respectively are melted and are recast into a single cube. Then the lateral surface area
of the new cube is (in sq. cms)
of the new cube is (in sq. cms)
216
256
72
144
22056.A ladder 25 m long reaches a window of building 20 m above the ground. Then the distance of the foot of the ladder from the building is
35m
45 m
30 m
15 m
22060.A hollow sphere in which a circus motorcyclist performs his stunts, has an inner diameter of 7 metres. The area available to the motorcyclist for riding is (in Sqm)
77
154
44
144
22064.1 sq decimetre is equal to
$10^{-2}$ ares
$10^{-4}$ sq. decameters
$10^{-4}$ hectares
$10^{-2}$ sq. decameters