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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Each day, Robert eats 40% of the pistachios left in his jar at that time. At the end of the second day,27 pistachios remain. How many pistachios were in the jar at the start of the first day?...?

(A) 75
(B) 80

(C) 85
(D) 95

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If 3a + 5b / 3 * a - 5b = 5 then a: b is equal to...?

(A) 2:1
(B) 2:3

(C) 1:3
(D) 5:2

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if 35 labourers dig 805 cubic meter of earth in 5 hrs how much of the earth will 30 labouees dig in 6 hrs...?

(A) 728 m3
(B) 828 m3

(C) 928 m3
(D) None of these

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A positive number when decreased by 4 becomes 21 times its reciprocal. The number is ______...?

(A) 5
(B) 6

(C) 7
(D) 8

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Evaluate: sqr(248 + sqr64)...?

(A) 14
(B) 18

(C) 16
(D) 36

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If x, y are two positive real number and X power 1/3 = Y power 1/4 , then which of the following relations is true:...?

(A) XY
(B) X³=Y

(C) X=Y
(D) None of these

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Average of ten number is x if each Number is increased by 10% than x ...?

(A) Remained unchanged
(B) May decreased

(C) May increased
(D) Is increased by 10%

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If Ali's salary is 10% more than that of Sajjad's, then how much percent is Sajjad's salary is less than that of Ali...?

(A) 100/11
(B) 105/11

(C) 107/11
(D) 109/11

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Three quantities a, b, c of a: b=1:2, b:c 2:3 then it continues as______...?

(A) 3:4:5
(B) 2:3:4

(C) 1:2:3
(D) None of these

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