Elitmus Exam

no 4 digit numbers formed with a b c d
such that a

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Elitmus Other Question

Two persons X and Y start simultaneously from A and B and walk towards each other. They meet after 1/2 hour and continue to walk towards their destination. If X reaches 25 minutes after Y reached the destination, find the ratio of their speeds. Let Q be any number less tahn 200 which leaves remainder when divisible by 5 or 7. What is the sum of all those numbers of Q?