A piece of farm machinery is rotated clockwise by 140 degrees 32 times and then by 131 degrees 40 times, to end up facing the same way as before. How many complete turns has it made?
27
(140*32+131*40)/360=27
In a robotic dance routine, Naina has to rotate herself in a clockwise direction by 60 degrees 16 times, and then by 120 degrees four times, to end up facing the same way as she started. How many complete turns has she made?
A family, made up of 2 parents with children, has an average age of 20.
If you exclude one parent, who is 40, the average age drops to 15.
How many kids are in the family?
