Consider a watch face which has identical hands and identical marks
for the hours. It is opposite to a mirror. When is the time as read
direct and in the mirror exactly the same between 6 and 7?
A mother wants to share a sum of money by giving each of her
children in turn a lump sum plus a fraction of the remainder. How
can she do this in order to share the money out equally?
A simple method of defining the coefficients in the equations of chemical reactions with the help of a system of linear algebraic equations.
Two different candles are
lit. They burn at different rates and one
is 3 cm longer than the other.
The longer one was lit at 5.30 pm and
the shorter one at 7 pm.
At 9.30 pm they were both the same
The longer one, burned out at 11.30
pm and the shorter one burned out at 11 pm.
How long was each candle