56
56
56
56
LCD(15, 7, 8) = 840.
The LCD is 56. The two have no common factors, so the LCD is their product, 7 x 8 =56
LCD is 24
56 is the lcd of 8 and 7. You can get this by multiplying 8x7. 8 and 7 have no common factors; that is why you multiply the two numbers to get the lcd.
It is done by: 7*8 = 56
168
280
280
8
8.
LCD(10, 8, 7) = 280.
LCD(8, 21, 7) = 168.