Three buses provide small tours of the city during the day. They all depart at 8 o’clock each morning from the rail station. The tours last 20 minutes, 30 minutes, and 24 minutes, respectively. When will it be the first time when the three bus drivers meet again at the railway station?

Lisa has 8 dice with the letters A, B, C and D, the same letter on all sides of each die. She builds a block with them. Two adjacent dice always have different letters. What letter is on the die that cannot be seen on the picture(in the far bottom corner of the block)?

Both figures on the right are formed from the same five pieces. One of the pieces is a rectanglewith a length of 10 cm and a width of 5 cm, and the other pieces are quarters of two different circles. What is the difference in the perimeterlengthsof the figures?

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