1 m2 = C . 100 cm2

Pi is 3,14

The following fractions greater than 1 is : D . 14/8

There are 10 hands shakes tock place at the party

Pi : 3,14

that is 6

oh , i forget . i will for

it is very easy . who answer first , i will for . remember me

X : 3 : 2 = 9

X : 3 = 9 x 2

X : 3 = 18

X = 18 x 3

X = 54

60 x 60 x 24 x 365 x 100 = 3 153 600 000 seconds

XXI have 25 leap years . So :

60 x 60 x 24 x 366 x 25 = 790 560 000 seconds

In XXI have 3 153 600 000 + 790 560 000 = 3944200000 seconds

I think it is 15 , but I don ' t know

We can see : 100 double 50 .

The sum of them is : 100 + 50 = 150 ( frames and lenses )

50 = 1/3 of 150

100 = 2/3 of 150

So we need the workers to make lenses is : 

90 : 3 = 30 ( workers )

The number of term is :

( 1000 - 1 ) : 1 + 1 = 1000

The sum of ranges is :

( 1000 + 1 ) x 1000 : 2 = 500500