Question 229152
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331 to 336 : 6 numbers


340 to 366 : 1 way to choose high digit, 3 ways to choose middle digit, 7 ways to choose low digit : 1 X 3 X 7 = 21


400 to 666 : 3 ways to choose high digit, 7 ways to choose middle digit, 7 ways to choose low digit:  3 X 7 X 7 = 147


6 + 21 + 147 = 174



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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