What is the least common multiple of 55,75,and 115

 The least common multiple of the given numbers
=> 55
=> 75
=> 115

First, let’s decompose or find the prime factors of each numbers
=> 55 = 5 x 11
=> 75 = 3 x 5 x 5 or 3 x 52
=> 115 = 5 x 23
Now, we have the common prime factor which is 5.
The uncommon prime factors which are  11, 3 and 23
And the greatest exponent = 52

LCM = 52 x 11 x 3 x 23
=> 18, 975

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)