Advertisements
Advertisements
प्रश्न
Three bells toll at intervals of 9, 12 and 15 minutes respectively. If they start tolling together, after what time will they next toll together?
उत्तर
It is given that three bells toll at the intervals of 9, 12, and 15 minutes, respectively.
We need to find out if they start tolling together and after what time they will next toll together.
LCM of 9, 12, 15 can be found as:
On doing factorization of 9, 12 and 15, we get,
9 = 32
12 = 22 × 3
15 = 5 × 3
LCM can be written as = 32 × 22 × 5 = 180
Time = 180 minutes = 3 hours
APPEARS IN
संबंधित प्रश्न
There is a circular path around a sports field. Sonia takes 18 minutes to drive one round of the field, while Ravi takes 12 minutes for the same. Suppose they both start at the same point and at the same time, and go in the same direction. After how many minutes will they meet again at the starting point?
Determine the prime factorisation of each of the following positive integer:
20570
Find the LCM and HCF of the following pair of integers and verify that LCM × HCF = Product of the two numbers.
26 and 91
Express the number as a product of its prime factor:
3825
Express the number as a product of its prime factor:
5005
If 13824 = 2a × 3b then find a and b
If p1x1 × p2x2 × p3x3 × p4x4 = 113400 where p1, p2, p3, p4 are primes in ascending order and x1, x2, x3, x4, are integers, find the value of p1, p2, p3, p4 and x1, x2, x3, x4
The number in the form of 4p + 3, where p is a whole number, will always be ______.
Let a and b be two positive integers such that a = p3q4 and b = p2q3, where p and q are prime numbers. If HCF (a, b) = pmqn and LCM (a, b) = prqs, then (m + n)(r + s) = ______.
The prime factorisation of the number 2304 is ______.
