Two sides ^@AB^@ and ^@BC,^@ and the median ^@AD^@ of ^@ \triangle ABC^@ are correspondingly equal to the two sides ^@PQ^@ and ^@QR,^@ and the median ^@PM^@ of ^@\triangle PQR.^@ If ^@AB = 13 \space cm, AD = 7 \space cm,^@ and ^@AC = 8 \space cm,^@ then the length of ^@ PR^@ is:
The numbers 1 to 7 are written on 7 pieces of paper and dropped into a box. Three of them are drawn at random. What is the probability that the three pieces of paper picked have numbers that are in arithmetic progression?
Two candles have different lengths and thickness. The shorter lasts 7 hours and the longer 4 hours when both are lit simultaneously. If after 2 hours of their being lit together at the same time, both have the same length, then find the ratio of their original lengths.
At what point does the line represented by the equation 3x + 2y = 32 intersects a line which is parallel to the y-axis, and at a distance 4 units from the origin and in the positive direction of the x-axis.