What is 1 + 3 + 5 + 7 + 9?

What is 1 + 3 + 5 + 7 + 9?


twenty-five



5 / 8 of 40 is equivalent to 5 / 12 of (); there are () 1 / 9 in 1 / 3


5 / 8 of 40 is equivalent to 5 / 12 of (60); there are (3) 1 / 9 in 1 / 3



2001-1998+1995-1992+… +15-12+9-6+3.


(2)2001-1998+1995-1992+… +15-12+9-6+3,=(2001-1998)+(1995-1992)+… +(15-12)+(9-6)+3,=[(2001÷3-1)÷2]×3+3,=[666÷2]×3+3,=333×3+3,=1002.