Question

1. Square shaped stamps, each of side 2 cm are pasted on a rectangular sheet of paper 30 cm by 18
without any gaps, what is the number of stamps pasted ?​

Answer 1

Answer:

Like matrix in mathematics

2x2 matrix contain 4 elements

3x3 matrix contain 9 elements

Here 1st row 15 stamps(15*2=30)

Column contain 9 stamps(9*2=18)

So 15*9=135 stamps totally