Find the LCM of the numbers 780, 2080 and 2600.
31200
Write each number as a product of prime factors.
\(780 = 2^2 \times 3 \times 5 \times 13\).
\(2080 = 2^5 \times 5 \times 13\).
\(2600 = 2^3 \times 5^2 \times 13\).
The LCM takes the highest power of each prime: \(2^5 \times 3 \times 5^2 \times 13\).
\(= 32 \times 3 \times 25 \times 13 = 31200\).
Hence, the LCM is 31200.
The ratio of two numbers is \(3:4\) and their HCF is 7. Their LCM is:
The sum of two numbers is 88 and their L.C.M. is 870. The two numbers are:
Rama made necklaces with either 24 beads, 36 beads or 40 beads, such that no bead was left over. What is the least number of beads Rama could have?
Six bells begin to toll together and toll, respectively, at intervals of 3, 4, 6, 7, 8 and 12 seconds. After how many seconds, will they toll together again?
A and B are two prime numbers such that A > B and their LCM is 209. The value of A 2 - B is:
Find the least number which when divided by 12, 18, 24 and 30 leaves 4 as remainder in each case, but when divided by 7 leaves no remainder.
Calculate the HCF of \(\frac{12}{5}\) , \(\frac{14}{15}\) and \(\frac{16}{17}\) .
Three numbers are in the proportion of 3 : 8 : 15 and their LCM is 8280. What is their HCF?