40/(1/2)+15 =40*2+15 =80+15 =95

40 / (1/2) = 80

Add 15 => 80+15 = 95

40/(1/2)+15 =40*2+15 =95

If 9 boy working 15/2 hours a day can finish a work in 20 days, then how many days will be taken by 12 boy working 6 hours a day to finish the work, it being given than 3 boy of latter type work as much as 2 boy of he former type in the same.

Find the value of x and y if

[40/(x+y)] + [2/(x-y)] = 5 [25/(x+y)] - [3/(x-y)] = 1

My house number is such that, when divided by 2, 3, 4, 5 or 6 it will always leave a remainder of 1.

However, when divided by 11 there is no remainder. What is my house number?