The merchant gets 15 ingots for every 2 spice bags. To find the total for 12 bags, divide 12 by 2 to get 6 pairs, then multiply 6 by 15, resulting in 90 copper ingots.
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First, find a common denominator for 1/6 and 2/5, which is 30, giving 5/30 and 12/30. The five rational numbers lying between them are 6/30, 7/30, 8/30, 9/30, and 10/30.
To find 6 rational numbers between 3 and 4, convert them into fractions with a denominator of 7, giving 21/7 and 28/7. The intermediate numbers are 22/7, 23/7, 24/7, 25/7, 26/7, and 27/7.
To find rational numbers between 3.1415 and 3.1416, extend the decimal places by appending digits. Three distinct rational numbers falling within this specific range are 3.14151, 3.14152, and 3.14153.
The initial noon temperature is 4. Since it drops by 15, we subtract 15 from 4. The mathematical calculation is 4 minus 15, which results in a midnight temperature of -11 degrees Celsius.