The answer is 5B because d is 13 and 13 times 7 is 91, and 16 goes into 91 5 times remainder 11, and 11 is B, so it is 5B
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Octal: 0 1 2 3 4 5 6 7 Hexadecimal: 0 1 2 3 4 5 6 7 8 9 A B C D E F
D
It is simply 7d which means 7 times d
The decimal system has only ten distinct symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. Mathematics can involve calculation in other bases - one that is not so rare is the hexadecimal system - which is base 16. You need 16 distinct symbols for the hexadecimal system and so you use A, B, C, D, E and F along with the decimal digits.
what is d over 12 plus 7 times d over 12 equal