find positive integers x,y,z such that 28x+30y+31z=365
use exact calculation (no calculators or decimals allowed) to decide which is larger:
(a) 28% of 75 or 75% of 28? (b) 76% of 27 or 57% of 36?
the 1st July is a beautiful date, since the shortened form of the year number is equal to the product of the day number and the month number. 1.7.70. how many years in the 21st century have no beautiful dates at all?
there are more but some have diagrams so i cannot type them out,,
thanks u soo much!! xxxx