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1 .
A piece of string is cut into four parts. Two parts are equal in length, and the
difference between thelengths of two remaining parts is 2 cm. Suggest the
original length of the piece of string .
2 .
In the equation AB+ AC =BB,each letter represents an integer from 0 to 4.
Difference letter represents difference integer.Suggest one value for each letter which satisfies the equation .
3.
A wire is first bent into a square with sides of 9 cm. It is then bent into a
2
rectengle with an area greater than 70 cm .Find two possible dimensions of
the rectengle.
更新1:
2 70 cm.
