,900, 120000,90
Second, (1)36=2.
×2×3×3
78=2×3× 13
90=3×3×2×5
(2) Maximum common factor 8
Least common multiple 504;
Maximum common factor 1
Minimum common multiple 72;
(84,56) = 28
The longest side is 28 meters.
56/28×(84/28)=6 (block)
Four. = ( 1+ 1/2+ 1/3+ 1/4) × ( 1/2+ 1/3)+( 1/4) 2+ 1/3+ 1/4)×( 1/2+ 1/3+ / kloc-0//4)- 1/5×( 1/2+ 1/3+ 1/4)
= 1/5