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The ratio of A.M. (arithmetic mean) and G.M. (geometric mean) of two positive number a and b is m:n. Prove that a:b = (m2 + m2 - n2 ):(m2 - m2 - n2 ...

which one is greater: A=20104019 or B=2009200920112011 ...

Bone matrix is rich in a) Fluoride and calcium b) Calcium and phosphorus c) Calcium and potassium d) Phosphorus and potassium ...

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Bud in notches of leaves of which of the following plants help in its propagation? a) radish b) Bryophyllum c) Bougainvillea d) jasmine ...

Law of reflection in irregular surface is a) obeyed b) not obeyed c) depends on the material of the surface d) none of these ...

A disk of radius r,mass m which has a charge q distributed uniformly over it is rotating in a magnetic field B about it's axis with an angular speed ω.Find the ratio of magnetic moment and angular momentum. ...

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Bacterium responsible for curdling of milk is a) Lactobacillus b) E. coli c) Rhizobium d) Plasmodium ...

2.5 litres of 1M NaOH solution is mixed with 3 litres of 0.5M NaOH solution. What is the molarity of the resulting solution? ...

Water exists in which state? a) Solid b) Liquid c) Gas d) All of these ...

A coil of area A = 0.5 m2 is situated in a uniform magnetic field B = 4.0 wb/m2 and area vector makes an angle of 60o with respect to the magnetic field as shown in figure. The value of the magnetic flux through the area A wo ...

In Test 502 of class 8, I got only one question wrong.The instructions said that +3 is for correct response and -1 for a wrong response.However I got 31 out of 40.How? ...

A unicellular alga is a) Volvox b) Spirogyra c) Chlamydomonas d) Vaucheria ...

Multiply : (4x + 1) and (3x -7) a) 12x2 - 25x -7 b) 12x2 - 25x +7 c) 12x2 + 25x -7 d) 12x2 + 25x +7 ...

PN, PM, and AB are tangents to the circle as shown. If PM = 11 in., then find the perimeter of ΔPAB. *Image* 32 in. 27 in. 26 in. 22 in. ...

The electronegativities of F,~Cl,~Br and I are 4.0, 3.0, 2.8 and 2.5 respectively. Hydrogen halide with a high percentage of ionic character is a) HF b) HCl c) HBr d) HI ...

A car weighing 200 kg accelerates from rest at the rate of 5 m/s2. Find its momentum after 10 s. a) 10000 b) 1000 c) 500 d) none of them ...

If the points (–5, 1), (p, 5) and (10, 7) are collinear, then the value of p will be a) 5 b) 3 c) 4 d) 7 ...

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How high is a parabolic arch of span 24 m and height 18m at a distance of 8 m from the centre of the span? ...

If the points (1, 1), (–1, –1) and (-√3, k) are vertices of an equilateral triangle then the value of k will be a) 1 b) -1 c) -√3 d) √3 ...

when an article is sold for Rs.X ,loss percentage is equal to L%. however,when same article is sold for Rs. Y ,profit percentage is equal to P%. what is CP of that article? ...

1.\int_{0}^{x}[1+t]^{3}dt 2.\int_{0}^{x}[x]dx plz help sir ...

Four-chambered heart is present in a) frog b) crocodile c) shark d) lizard ...

Water vascular system is a distinctive feature of a) echinodermata b) annelida c) chordata d) mollusca ...

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What will be observed if baking soda is added to vinegar? a) A solution is formed b) Effervescence occurs c) Precipitation occurs d) Colour change occurs ...

The average age of a group of 8 members is the same as it was 3 yr ago, when a young member is substituted for an old member. The incoming member is younger to the outgoing member by a) 11 yr b) 16 yr c) 20 yr d) 24 yr ...