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What is the simplified value of 1/(√25–√24)–1/(√24–√23)+1/(√23–√22)–1/(√22–√21)+1/(√21–√20) ? 

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aditya, a trader, sells an item to reatiler at 20% discount, but charge 10% on the discounted price, for delivery and packaging . the retailer sells it for 2046 more , thereby earning a profit of 25% . At what price had the trader marked the item ?

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In the Surds and Indices module, the first video at 3:20, it is said that when the surd in denominator is multiplied by its conjugate in both numerator and denominator, then we get, as in the example, (a- rt.b)/(a^2 - b^2).

I don't understand how that can be because I think it will because I think it will be (a- rt.b)/(a^2 - b).

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I have 2 years of work ex, I quit my job and came back to my home town as my father suffered from a brain stroke.

so since November 2018, I haven't worked anywhere as my family need me at their disposal at all times.

I don't think he will be able to recover any time soon. However, will this affect my chances in the personal interview as I will not be able to work till I appear for the 2019 CAT exam?

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I purchased MBA full mock test pack but All mocks other than CAT like XAT, NMAT, IIFT are showing as not started.why???

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