In the 4X4 grid shown, the numbers 1,2,3 and 4 can appear exactly once in each row, each column, and in each separate 2X2 grid. Five entries are given. What number should replace X?
Gina is taller than Henry but shorter than Jennie. Ivan is taller than Katie but shorter than Gina. Who is the tallest of these five people?
How many square units bigger is a 5X5 square than a 4X4 square?
In the 4X4 grid shown, the numbers 1,2,3 and 4 can appear exactly once in each row, each column, and in each separate 2X2 grid. Five entries are given. What number should replace X?