There are coins on the board. We want to have two coins in each column and two coins in each row. How many coins need to be removes ?
IKMC Grade 1 - 2
Câu hỏi liên quan
Ken’s old clock chimes once at 1 o’clock. It chimes twice at o’clock, thrice at 3 o’clock and so on. How many times does the old clock chime altogether from 1 pm to 8 pm ?
Don made two bricks by sticking cubes together as shown below
Which structure could not be built using the two bricks ?