What is LCM ? Define itt , and experts please give a certificate to the first answerer . 

FOR EX.- LCM (Least Common Multiple)
In arithmetic and number theory, the least common multiple or lowest common multiple (lcm) or smallest common multiple of two integers a and b is the smallest positive integer that is a multiple of both a and b. Since it is a multiple, it can be divided by a and b without a remainder. If there is no such positive integer, e.g., if a = 0 or b = 0, then lcm(a, b) is defined to be zero.

For example, the least common multiple of the numbers 4 and 6 is 12.

Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps? To solve this we need to find the LCM or (Least Comon Mutiple).

  Step measure of 1^st Boy = 63 cm

Step measure of 2^nd Boy = 70 cm

Step measure of 3^rd Boy = 77 cm

LCM of 63, 70, 77

LCM = 2 x 3 x 3 x 5 x 7 x 11 = 6930

Hence, the minimum distance each should cover so that all can cover that is The LCM = 6930

Hope it was imformative

 please , needed Especialy from experts

ok i also didnot no thank you.

FOR EX.- LCM (Least Common Multiple)In arithmetic and number theory, the least common multiple or lowest common multiple (lcm) or smallest common multiple of two integers a and b is the smallest positive integer that is a multiple of both a and b. Since it is a multiple, it can be divided by a and b without a remainder. If there is no such positive integer, e.g., if a = 0 or b = 0, then lcm(a, b) is defined to be zero.For example, the least common multiple of the numbers 4 and 6 is 12.

Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps? To solve this we need to find the LCM or (Least Comon Mutiple).

Step measure of 1stBoy = 63 cm

Step measure of 2ndBoy = 70 cm

Step measure of 3rdBoy = 77 cm

LCM of 63, 70, 77

2

63, 70, 77

3

63, 35, 77

3

21, 35, 77

5

7, 35, 77

7

7, 7, 77

11

1, 1, 11

1, 1, 1

LCM = 2 x 3 x 3 x 5 x 7 x 11 = 6930

Hence, the minimum distance each should cover so that all can cover that is The LCM = 6930

Hope it was imformative

please ,needed Especialy from experts

Answer By Sandeep Kumar Dash

The smallest number that is a multiple of two or more numbers.

FOR EX.- LCM (Least Common Multiple)In arithmetic and number theory, the least common multiple or lowest common multiple (lcm) or smallest common multiple of two integers a and b is the smallest positive integer that is a multiple of both a and b. Since it is a multiple, it can be divided by a and b without a remainder. If there is no such positive integer, e.g., if a = 0 or b = 0, then lcm(a, b) is defined to be zero.For example, the least common multiple of the numbers 4 and 6 is 12.

Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps? To solve this we need to find the LCM or (Least Comon Mutiple).Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps? To solve this we need to find the LCM or (Least Comon Mutiple).

Step measure of 1stBoy = 63 cm

Step measure of 2ndBoy = 70 cm

Step measure of 3rdBoy = 77 cm

LCM of 63, 70, 77

2

63, 70, 77

3

63, 35, 77

3

21, 35, 77

5

7, 35, 77

7

7, 7, 77

11

1, 1, 11

1, 1, 1

LCM = 2 x 3 x 3 x 5 x 7 x 11 = 6930

Hence, the minimum distance each should cover so that all can cover that is The LCM = 6930

Hope it was imformative

please ,needed Especialy from experts

Answer By Sandeep Kumar Dash

The smallest number that is a multiple of two or more numbers.

Example: the Least Common Multiple of 3 and 5 is 15, because 15 is a multiple of 3 and also a multiple of 5. Other common multiples include 30 and 45, etc, but they are not the smallest (least).(Also called Lowest Common Multiple)

FOR EX.- LCM (Least Common Multiple)In arithmetic and number theory, the least common multiple or lowest common multiple (lcm) or smallest common multiple of two integers a and b is the smallest positive integer that is a multiple of both a and b. Since it is a multiple, it can be divided by a and b without a remainder. If there is no such positive integer, e.g., if a = 0 or b = 0, then lcm(a, b) is defined to be zero.For example, the least common multiple of the numbers 4 and 6 is 12.

Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps? To solve this we need to find the LCM or (Least Comon Mutiple).Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps? To solve this we need to find the LCM or (Least Comon Mutiple).

Step measure of 1stBoy = 63 cm

Step measure of 2ndBoy = 70 cm

Step measure of 3rdBoy = 77 cm

LCM of 63, 70, 77

2

63, 70, 77

3

63, 35, 77

3

21, 35, 77

5

7, 35, 77

7

7, 7, 77

11

1, 1, 11

1, 1, 1

LCM = 2 x 3 x 3 x 5 x 7 x 11 = 6930

Hence, the minimum distance each should cover so that all can cover that is The LCM = 6930

Hope it was imformative