Please answer this correctly

What is the lcm of 16 and 40 ? 24 and 40 ?

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Alarger number is double the sum of a smaller number. the larger number is 2 less than 3 times the smaller number. if y represents the larger number and x represents the smaller number, which equations model the situation