book Maths Puzzle Numerical Ability

Can someone help me with this problem?

Subtract:

6 4/5 - 2 1/5

Thanks,
Sher

Read Solution (Total 0)

book Other Question

Solve 2/3^2x = 12. Please do you have a simple formula for finding the centre of a 2 dimensinal circle if I know 3 points on this circle?