Problem: Ibn Sina subsequently settled at Rey, in the vicinity of modern Tehran, the home town of Rhazes; where Majd Addaula, a son of the last Buwayhid emir, was nominal ruler under the regency of his mother (Seyyedeh Khatun). About thirty of Ibn Sina's shorter works are said to have been composed in Rey. Constant feuds which raged between the regent and her second son, Shams al-Daula, however, compelled the scholar to quit the place. After a brief sojourn at Qazvin he passed southwards to Hamadãn where Shams al-Daula, another Buwayhid emir, had established himself. At first, Ibn Sina entered into the service of a high-born lady; but the emir, hearing of his arrival, called him in as medical attendant, and sent him back with presents to his dwelling. Ibn Sina was even raised to the office of vizier. The emir decreed that he should be banished from the country. Ibn Sina, however, remained hidden for forty days in sheikh Ahmed Fadhel's house, until a fresh attack of illness induced the emir to restore him to his post. Even during this perturbed time, Ibn Sina persevered with his studies and teaching. Every evening, extracts from his great works, the Canon and the Sanatio, were dictated and explained to his pupils. On the death of the emir, Ibn Sina ceased to be vizier and hid himself in the house of an apothecary, where, with intense assiduity, he continued the composition of his works.
How many of Ibn Sina's longer works were said to have been created in Rey?
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Answer: unanswerable


Problem: Canada's Armed forces operate out of 27 Canadian Forces bases (CFB) across the country, including NDHQ. This number has been gradually reduced since the 1970s with bases either being closed or merged. Both officers and non-commissioned members receive their basic training at the Canadian Forces Leadership and Recruit School in Saint-Jean-sur-Richelieu. Officers will generally either directly enter the Canadian Armed Forces with a degree from a civilian university, or receive their commission upon graduation from the Royal Military College of Canada. Specific element and trade training is conducted at a variety of institutions throughout Canada, and to a lesser extent, the world.
How many Canadian Forces bases are there in Canada?
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Answer: 27


Problem: It is not only the proportion of latewood, but also its quality, that counts. In specimens that show a very large proportion of latewood it may be noticeably more porous and weigh considerably less than the latewood in pieces that contain but little. One can judge comparative density, and therefore to some extent strength, by visual inspection.
What could we call some specimens with a high proportion of latewood that explains why they weigh less than specimens with much less latewood?
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Answer:
porous