Maths leo

What percentage is 0.002cm of 4cm

The ratio of girls to boys in a school is 7/2:19/4. What percentage of the school do the boys represent. ( 2d.p)

Evaluate

29.6-72.3/0.28×0.09

(3d.p)

Evaluate

-1/4-(-1/2)

The wiper of a bus is 40cm long. It sweeps out through an angle of 120° on a flat windscreen. Calculate the distance moved by the tip of the wiper in one "sweep"

Fifteen tractors each working eight hours a day take eight days to plough a piece of land. How long would it take 24 tractors working 10hours a day take to plough the same piece of land

Factorise

ay+3+y+3a

Factorise

nx-2n+3mx-6m