Elitmus Exam Logical Reasoning Cryptography

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Elitmus Other Question

Do any1 remember d question of TSD of 11 nov 2015.... how to solve dt one?

two trains with speeds of 60,65 kmph running in opposite direction.. distance between them is 19 or 21 km(i dnt remember)... at what distance from the train B will the two trains meet for second time?
Sherlock Homes and Dr. Watson have to travel from Rajeev Gandhi chowk to Indira
Gandhi International Airport via the metro. They have enough coins of 1, 5, 10 and 25
paise. Sherlock Homes agree to pay for Dr. Watson only if he tells all the possible
combinations of coins that can be used to pay for the ticket.
How many combinations are possible if the fare is 50 paise ?
A. 52
B. 49
C. 45
D. 44