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1. In a morning walk, three persons step off together . Their steps 80cm, 85cm, and 90cm respectively.What is the minimum distance each should walk so that all can cover the same distance.
2. The least number which when divided by 20, 25, 35 and 40 leaves the remainder 14, 19, 29, and 34 respectively, is
3.The largest number which divides 25, 73 and 97 to leave the same remainder in each cases.
4. The least number of square tiles required to pave the ceiling of a room15m17cm and 9m and 2cm broad is
5. Five bells first begin to toll together and then at intervals of 3, 5, 7, 8, and 10s. find after what interval they will again toll together . How many times does they together in one hour.
6. The Lcm of(16 - x^2) and (x^2 + x - 6) is
7 .The Lcm of two numbers is (a+b ) and their HCF is P(a-b). If one of the numbers is P, then the other number is
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