Math
posted by Iris .
Hope Mom baked a cake in rectangular shape 10 by 6. If she starts at the corner and put acndle every 2 inches how many candles will fit around the edge of the cake?

I will assume you mean 10 inches by 6 inches.
10 + 6 + 10 + 6 = 32 inches for the cake's perimeter, right? Divide by 2, and you get 16 candles.
So test it. Draw a rectangle 10" x 6" and mark a circle every two inches, starting from one of the corners. I think you'll find the number of candles is not 16!! 
mmmmh ... ?
I do count 16 
The deck in hopes backyard is round. It has 5 posts evenly spaced around the edge to support a trellis. For her birthday party, she wants to connect each post to all the other posts with crepepaper streamers. How many streamers will she need?