The length of a rectangle is twice its width. If the perimeter of a rectangle is the same as the perimeter of a square of size 9, what is the length of a diagonal of the rectangle ?
Sonia buys two off-cuts of ribbon in a sale. One is 153 cm long. The other is 204 cm long. She cuts them so that she ends up with a number of pieces all the same length. What is the greatest length each piece can be ?
Naghmana has 4 shirts of red, blue, green, and brown colors. She also has 3 trousers of black. brown, and white colors. How many different shirt trouser combinations can she wear, if she has decided to wear the white trouser?