Advertisements
Advertisements
प्रश्न
Express the number as a product of its prime factor:
140
Advertisements
उत्तर
∴ 140 = 2 × 2 × 5 × 7
= 22 × 5 × 7
APPEARS IN
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.
Find the LCM and HCF of the following integers by applying the prime factorisation method.
12, 15 and 21
Find HCF and LCM of 404 and 96 and verify that HCF × LCM = Product of the two given numbers.
Determine the prime factorisation of each of the following positive integer:
20570
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.\[\frac{129}{2^2 \times 5^7}\]
If m, n are natural numbers, for what values of m, does 2n × 5m ends in 5?
Find the greatest number consisting of 6 digits which is exactly divisible by 24, 15, 36?
If two positive integers A and B can be expressed as A = xy3 and B = x4y2z; x, y being prime numbers then HCF (A, B) is ______.
The ratio of LCM and HCF of the least composite and the least prime numbers is ______.
The least number that is divisible by all the numbers from 1 to 10 (both inclusive) is ______.
Show that 12n cannot end with the digit 0 or 5 for any natural number n.
On a morning walk, three persons step off together and their steps measure 40 cm, 42 cm and 45 cm, respectively. What is the minimum distance each should walk so that each can cover the same distance in complete steps?
Statement A (Assertion): If product of two numbers is 5780 and their HCF is 17, then their LCM is 340.
Statement R (Reason): HCF is always a factor of LCM.
Find the HCF and LCM of 72 and 120.
Assertion (A): The HCF of two numbers is 5 and their product is 150. Then their LCM is 40.
Reason(R): For any two positive integers a and b, HCF (a, b) × LCM (a, b) = a × b.
(HCF × LCM) for the numbers 30 and 70 is ______.
If HCF (72, 120) = 24, then LCM (72, 120) is ______.
The mean of first ten natural numbers is ______.
The prime factorisation of the number 5488 is ______.
