The least number which is exactly divisible by 10,15 and 20 is

The least number which is exactly divisible by 10,15 and 20 = LCM (10.15 & 20) = 60.

- The LCM of two numbers is 1991 and their HCF is 23. If one of the numbers is 181, the other number is
- LCM and HCF of the two numbers are 225 and 15 respectively. One of the numbers is 45, then find the second number.
- The HCF of each pair of 5 numbers is 3 and their LCM is 159. Find the multiplication of all the number.
- If HCF of two numbers is 27 then which of the following can never be their LCM?
- 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 greatest number of four digits which when divided by 10, 12, 14 leave remainders 5, 7, 9 respectively is:
- Four machine makes a beep after every 1, 3, 5 and2 min respectively . In 5hrs , how many times do they beep together if they have just beeped together.
- The maximum number of students among whom 891 pens and 810 pencils can be distributed in such a way that each student gets same number of pens and same number of pencils, is :
- The sum of two numbers is 156 and their HCF is 26. Find how many such pairs can be formed.
- Two men started moving in a circular path from the same place at the same time in the same direction. If they complete one revolution in 12 min and 16 min respectively, then how long will they take to meet again?

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