Definition: This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning).
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.
Input: Passage: Setu coins or Setu bull coins are found in large quantities in the northern part of Sri Lanka and in Southern India. Codrington in his book Ceylon Coins and Currency published in 1924 and Mitchiner in his book Oriental Coins published in 1978 have clearly pointed out that the traditional design of Sri Lanka standing King Type Copper Massa of the Jaffna Kingdoms belongs to the Aryacakravarti dynasty from 1284 AD to 1410 AD. Setu coins were previously attributed to the Setupati Princes of Ramanathapuram in South India. There are two series one in the issued from the 13th to the 15th centuries and the other after the brief loss of sovereignty to the rival Kotte kingdom from 1450 to 1467 and reconstitution of the Kingdom. Even during the rule of Sapumal Kumaraya coins were issued in Jaffna that was distinct. Three types of this series are illustrated below. The obverse of these coins have a human figure flanked by lamps and the reverse has the Nandi symbol, the legend Sethu in Tamil with a crescent moon above. There are number of categories of these coins. In type I is closely aligned with the Chola copper coins of the 13th century although slightly larger in size. The Tamil Setu replaces the Nagari Rajaraja in the cola coins. In type I the blank is even broader but a recumbent bull appera obverse in a vertical position. In the coin type II the seated figure is replaced with a Bull.
Output:
How Chola copper coins could be distintguished?