Question
The wheel of an engine 5 (1/9) meters in circumference
makes five revolutions in 4 seconds. Find the speed of the train in km per hour.Solution
5 revolution = 4 seconds Then, 1 revolution = 4/5 seconds Speed = Distance/Time = [(46Â Ă— 5 )/(9Â Ă— 4)]Â Ă— (18/5) =Â 23 km/hr
What is the unit digit of the number 'Z' obtained by subtracting the largest two-digit prime number from the least common multiple (LCM) of all single-d...
The H.C.F of two numbers is 8 and their L.C.M is 136. If one of the numbers is 64, find the other?
- The product of two numbers is 198 and their HCF is 11. What is the LCM of these two numbers?
Find the largest four-digit number which when divided by each of 18, 21 and 24 leaves a remainder of 7.
What is the difference between the LCM and HCF of 36, 40?
Three numbers are in the ratio 2:5:7 respectively. If the HCF of the numbers is 6, then find the LCM of the numbers.
The greatest number of four digits which when divided by 10, 12, 14 leave remainders 5, 7, 9 respectively is:
What is the least number which when divided by 4, 6 & 8 leave a remainder 6 in each case & it is also divisible by 5?
The least number which when divided by 5, 10, 12 and 15 leave zero remainder in each case and when divided by 18 leaves a remainder of 6 is:
Three numbers are in the ratio 3:7:2 respectively. If the HCF of the numbers is 5, then find the LCM of the numbers.
