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The number 649578 is divisible by a)5 b)9 c)6 d)11

What is the best way to approach DI questions? As they tend to be calculation extensive, what is the best strategy to optimise the time?

how do isolve para jumbles

Find the digit in 469th place from right of 90^468

the rightmost non-zero digit of the number 20^2520?

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find minimal vvalue of the expression a^6+b^6 if a^2+b^2=1?( if ur answer is 1/4 tell me how 3a^2b^2 becomes 3/4)

A can do a piece of work in 10 days while B can do it in 15 days. They begin together but 5 days before the completion of the work , B leaves off. find the total number of days for the work to be completed?

how to approximate cube root of any number

The sum of all natural numbers less than 101 which are co-prime to 2, 3 and 5??