A, B and C can complete a work in 20, 12 and 8 days respectively. In how many days A and B together can complete that work...? Mcqs

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A, B and C can complete a work in 20, 12 and 8 days respectively. In how many days A and B together can complete that work...?

(A) 65/7 days
(B) 41/3 days

(C) 71/3 days
(D) 30/4 days

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Amy buys d dollars worth of groceries each week and spends one fourth of those dollars on fruit. In terms of d, how many weeks will it take Amy to spend a total of 1005 just on fruit...?

(A) 400/d
(B) d/100

(C) 25/d
(D) d/25

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Average of ten positive numbers is x If each number is increased by 10%, than x...?

(A) Remains unchanged
(B) May decrease

(C) May increase
(D) is increased by 10%

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A manufacturer of TV sets produced 600 units in the third year and 700 units in the seventh year. Assuming that the production increases uniformly by a fixed number every year, find the production in the first year?...?

(A) 250 TV sets
(B) 350 TV sets

(C) 450 TV sets
(D) 550 TV sets

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Find the height of a parallelogram whose area is 54 cm2 and the base is 15 cm:...?

(A) 2.6 cm
(B) 3.6 cm

(C) 4.6 cm
(D) 5.6 cm

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Is it necessary for an algorithm to solve a problem with an infinite number of steps?...?

(A) No
(B) Yes

(C) Error
(D) None of these

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David obtained 76, 65, 82, 67 and 85 marks [out of 100] in English, Mathematics, Physics, Chemistry and Biology. What are his average marks...?

(A) 65
(B) 68

(C) 75
(D) None of these

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The volume of a sphere is..?

(A) 4/3 pi r3
(B) 2/3 pi r3

(C) pi r3
(D) 2 pi r

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Product of two numbers is 72.Find the other number when one is 9...?

(A) 2
(B) 8

(C) 5
(D) None

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The radius of a circle is 10 cm and the length of one of its chords is 12 cm then the distance of the chord from the centre is:...?

(A) 6 cm
(B) 8 cm

(C) 10 cm
(D) 12 cm

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