a*****g 发帖数: 1320 | 1 麻烦给出解题过程, 谢谢了。
THE PRODUCT OF THE DIGITS OF 3214 IS 24. HOW MANY DISTINCT FOUR-DIGIT
POSITIVE INTEGERS ARE SUCH THAT THE PRODUCT OF THEIR DIGITS EQUALS 12? (TWO
EXAMPLES TO INCLUDE ARE 1126, 6112)
A. 33 INTEGERS B. 34 INTEGERS C. 35 INTEGERS D.36 INTERGERS. | s*******t 发帖数: 16 | 2 一看答案就是36了
具体过程, 1126, 1134, 1232
三个base, 每个换次序12个
TWO
【在 a*****g 的大作中提到】 : 麻烦给出解题过程, 谢谢了。 : THE PRODUCT OF THE DIGITS OF 3214 IS 24. HOW MANY DISTINCT FOUR-DIGIT : POSITIVE INTEGERS ARE SUCH THAT THE PRODUCT OF THEIR DIGITS EQUALS 12? (TWO : EXAMPLES TO INCLUDE ARE 1126, 6112) : A. 33 INTEGERS B. 34 INTEGERS C. 35 INTEGERS D.36 INTERGERS.
| d*******d 发帖数: 2050 | 3 12 == 3x2x2 == 3x4 == 6x2
3种可能性,每种12个可能.共36个. | a*****g 发帖数: 1320 | 4 Thanks a lot!
【在 s*******t 的大作中提到】 : 一看答案就是36了 : 具体过程, 1126, 1134, 1232 : 三个base, 每个换次序12个 : : TWO
| a*****g 发帖数: 1320 | 5 Thanks a lot!
【在 d*******d 的大作中提到】 : 12 == 3x2x2 == 3x4 == 6x2 : 3种可能性,每种12个可能.共36个.
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