Subject Category > Mathematics

Q. Both X and Y together can complete a work in 12 days and Y alone can complete the same work in 30 days. In how many days will X alone complete the work?

A) 20

B) 15

C) 16

D) 18

✔ 20

Additional Information > Exam point of View

Using the work formula: Total work = LCM of 12 and 30 = 60 units. X and Y together = 5 units/day, Y alone = 2 units/day. Thus, X alone = 5 − 2 = 3 units/day. Total time = 60 / 3 = 20 days.

Asked Question

Q 1.If a + b = 10 and ab = 21, then the value of (a - b)2 is

Right Answer : 16

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Right Answer : 49

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Q 3.A constituency is divided in four regions A, B, C and D. Two candidates X & Y contested the last election from that constituency. The adjoining graph gives the break up of voting in the four regions. Study the graph and answer the following questions.In region B, Y gets A% more votes than X. Find the value of A?

Right Answer : 21%

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Right Answer : GH

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Right Answer : 5

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Right Answer : 19/73 < 3/8 < 17/39 < 29/47

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Right Answer : Cousin

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Q 8.ΔGHI is similar to ΔKLM. If the ratio of Perimeter of Δ GHI : Perimeter of ΔKLM = 1:4, and length of GH is 2 cm, what is the length of the corresponding side KL?

Right Answer : 8 cm

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Right Answer : 2401

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Right Answer : iii, iv, ii, i

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