Advertisements
Advertisements
प्रश्न
Find the LCM and HCF of the following integers by applying the prime factorisation method.
12, 15 and 21
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 12n where n is a natural number. Check whether there is any value of n ∈ N for which 12n ends with the digital zero.
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.
Express the number as a product of its prime factor:
140
Determine the prime factorisation of each of the following positive integer:
58500
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. \[\frac{3}{8}\]
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.\[\frac{13}{125}\]
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:
3825
Find the LCM and HCF of the following pair of integers and verify that LCM × HCF = product of the two numbers.
510 and 92
Find the LCM and HCF of the following pair of integers and verify that LCM × HCF = product of the two numbers.
336 and 54
If m, n are natural numbers, for what values of m, does 2n × 5m ends in 5?
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
Express 98 as a product of its primes.
For some integer p, every odd integer is of the form ______.
The number in the form of 4p + 3, where p is a whole number, will always be ______.
For some integer m, every even integer is of the form ______.
Show that 12n cannot end with the digit 0 or 5 for any natural number n.
The LCM of smallest 2-digit number and smallest composite number is ______.
If n is a natural number, then 8n cannot end with digit
