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how to find HCF of fractions ?

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how to find square root of a number ending with 2,3,7,8? square root will always be an irrational number,is there any trick to find that number quickly?

Vinay's hobbies are to swim, to run and to ride a bicycle.
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how do i solve para jumbles

Only a single rail track exists between stations A and B on a railway line. One hour after the northbound super fast train N leaves station A for station B, a south-bound passenger train S reaches station A from station B. The speed of the super fast train is twice that of a normal express train E, while the speed of a passenger train S is half that of E. On a particular day, N leaves for B from A, 20 min behind the normal schedule. In order to maintain the schedule, both N and S increased their speeds. If the super fast train doubles its speed, what should be the ratio (approximately) of the speeds of passenger train to that of the super fast train so that the passenger train S reaches exactly at the scheduled time at A on that day? A 1 : 3 B 1 : 4 C 1 : 5 D 1 : 6

Remainder 93! Mod 97 ?

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