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let the speed of train A is x and speed of train B is 4y 450/x - 450/4y = 45 minutes(3/4) hour ------(1) 450/3y - 450x = 30 minutes (1/2) hour ------(2) on solving example (1) and (2) we get y = 30 and x = 100 km/hr Sped of A = 100 km/hr
Find the largest three-digit number that leaves '3', '4' and '5' as remainder when it is divided by '7', '8' and '9', respectively.
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Find the remainder when the number (289n + 147) is divided by 17.
4096 2048 514 64 4
...What is the smallest number that needs to be added to 978 to make it a multiple of 37?
Find the number of zeros at the end of 78!.
