Represent all the prime factors of 18 and 45 in a Venn diagram.
2 x 3 x 3 x 5 = 90
[Multiply all the factors in the Venn diagram.]
The LCM of 18 and 45 is 90.
Correct Answer is : 90
Q5Channel-A repeatedly broadcasts news for 40 minutes, channel-B repeatedly for 60 minutes and Channel-C repeatedly for 80 minutes. If all the channels start broadcasting news now, then after how many minutes will they broadcast news at the same time? A. Three channels will never be administered together. B. 200 minutes C. 180 minutes D. 240 minutes E. 160 minutes