Advertisements
Advertisements
प्रश्न
Find the LCM and HCF of the following integers by applying the prime factorisation method.
12, 15 and 21
Advertisements
उत्तर
 |
 |
 |
12 = 2 × 2 × 3
15 = 3 × 5
21 = 3 × 7
H.C.F of 12, 15 and 21 = 3
L.CM of 12, 15 and 21 = 2 × 2 × 3 × 5 × 7
L.C.M of 12, 15 and 21 = 420
संबंधित प्रश्न
Consider the number 6n where n is a natural number. Check whether there is any value of n ∈ N for which 6n is divisible by 7.
Given that HCF (306, 657) = 9, find LCM (306, 657).
Check whether 6n can end with the digit 0 for any natural number n.
Find the LCM and HCF of the following integers by applying the prime factorisation method:
40, 36 and 126
Write down the decimal expansions of the following rational numbers by writing their denominators in the form 2m × 5n, where, m, n are non-negative integers.\[\frac{129}{2^2 \times 5^7}\]
Express the number as a product of its prime factor:
5005
Find the LCM and HCF of the following pair of integers and verify that LCM × HCF = product of the two numbers.
336 and 54
For what value of natural number n, 4n can end with the digit 6?
Find the H.C.F. of 252525 and 363636
If 13824 = 2a × 3b then find a and b
Find the greatest number consisting of 6 digits which is exactly divisible by 24, 15, 36?
What is the smallest number that when divided by three numbers such as 35, 56 and 91 leaves remainder 7 in each case?
Find the least number that is divisible by the first ten natural numbers
The product of two consecutive natural numbers is always ______.
When a number is divided by 7, its remainder is always ______.
The largest number which divides 70 and 125, leaving remainders 5 and 8, respectively, is ______.
Find the HCF and LCM of 72 and 120.
If HCF (72, 120) = 24, then LCM (72, 120) is ______.
National Art convention got registrations from students from all parts of the country, of which 60 are interested in music, 84 are interested in dance and 108 students are interested in handicrafts. For optimum cultural exchange, organisers wish to keep them in minimum number of groups such that each group consists of students interested in the same artform and the number of students in each group is the same. Find the number of students in each group. Find the number of groups in each art form. How many rooms are required if each group will be allotted a room?
