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a:b=2:3, c:d=4:5, d:e=3:1, a:d=2:5, find ab+cd/BC+de

this is one of a question in cracku ratio test. in the solution, while calculating bc+de, you have divided 25x square/3 and taken LCM. why have u divided it by 3 ?

nearest galaxy to milky way galaxy is.. ??

x-1/x=3
find
x^4-1/x^4.

question not available in hindi

question is not available in hindi

HOW MANY 4 DIGIT NO.CAN BE MADE WITH THE DIGITS 1,2,3,4,5,6,7 DIVISIBLE BY 25 ONLY ONCE?

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ABCD is a rectangle with AD being longer side.P and Q be the mid-points of AB and CD.x is a point on AD.Then what is the ratio of Area of PQCB to XCB?
a)DQ=PB
b)AP=CQ

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