Question
Four runners started running simultaneously from a point on a circular track. They took 400 seconds, 600 seconds, 720 seconds and 900 seconds to complete one round. After how much time do they meet at the starting point for the first time ?
More HCF and LCM Questions
- The least number which when divided by 7, 12, 15 and 20 leave zero remainder in each case and when divided by 26 leaves a remainder of 4 is:
- The ratio of two numbers is 9:12 and their LCM is 324. The numbers are:
- Three numbers a, b and c are co-prime to each other such that ab = 70 and bc = 45. Find the value of (a + b + c).
- The sum and difference of L.C.M and H.C.F of two numbers is 216 and 184. If one of the numbers is 25, then find the other number.
- The smallest number which when divided by 22 and 34 leaves remainder 10 and 22 respectively is:
- Two numbers are in the ratio of 4:5, respectively. If their HCF is 18, then find their LCM.
- The HCF of 5453 and 6409 is 221, their LCM is:
- The sum and difference of L.C.M and H.C.F of two numbers is 312 and 208 respectively. If one of the numbers is 52, find the other number.
- The LCM of two numbers is 240, and they are in the ratio 3:5. Determine the sum of these numbers.
- The greatest number of four digits which when divided by 9, 12, 15 leave remainders 6, 9, 12 respectively is:
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