Did you ever wonder how you can master simple calculations? 37 + 49? let's add 3 to 37 making it 40 and then subtracting 3 from 49 making it 46. Here it is 46 + 40 = 86 which is same as 37 + 49 = 86. ...
If A completed the work in 4 days and B completed the same work in 5 days. How many days will they take on working together? Answer: Let total work is (lcm of 4 and 5) = 20 A's work in 1...