Question

Find the LCM of 16 90 91 280 455​

Answer 1

Given:

Numbers: 16, 90, 91, 280 & 455

To find:

L.C.M. of the numbers

Solution:

(i) We will find the L.C.M. of the numbers 16, 90, 91, 280 & 455 by the prime factorization method.

(ii) Let's first write the factors of each number

16 = 2 × 2 × 2 × 2

90 = 2 × 3 × 3 × 5

91 = 7 × 13

280 = 2 × 2 × 2 × 5 × 7

455 = 5 × 7 × 13

(iii) Now, we will take the least common factors of the numbers

L.C.M (16, 90, 91, 280 & 455) = 2⁴ × 3² × 5 × 7 × 13 = 65,520

Thus, $\boxed{The\:L.C.M.\:of 16,\:90,\:91,\:280\: and \:455\:is\:\bold{65,520}.}$

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Also View:

Find the LCM of  

i) 12, 18, 24 and 36 ii) 39, 65 and 130 iii) 20, 35, 15, and 45  

iv) 45, 60, 90 v) 28, 35, 42 vi) 6, 10, 20 and 30  

10. Find the HCF of  

i) 120 and 288 ii) 125, 200 and 250 iii) 5, 168, 140 and 252  

iv) 950, 75, 105 v) 48, 72, 60 vi) 770, 1078 and 924 first answer LCM THEN HCF​

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Answer 2

Given :  5 numbers 16 90 91 280 455​

To find : LCM

Solution:

16  = 2 * 2 * 2 * 2

90 = 2 * 3 * 3 * 5

91  = 7 * 13

280  = 2 * 2 * 2 * 5 * 7

455  = 5 * 7  * 13

LCM = 2 * 2 * 2 * 2 * 3 * 3 * 5 * 7 * 13

=  65520

LCM = 65520

Learn more:

lcm of 168, 180 and 330​ - Brainly.in

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