They are all correct except in 5), 4+8 is 12, not 13.
Draw a rectangle, draw a line in middle. This is a halve.
<span>Draw another rectangle, draw two lines. This is thirds.</span>
<span>Draw another rectangle, draw two lines but in a "+" type of way.. This is fourths.</span>
height of mt.= 4000meters
hope it helps...!!!