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Mental Arithmetic (Posted on 2003-10-05)

Difficulty: 3 of 5

I can multiply any three-digit number by 1667 in my head, usually in less than 10 seconds.

Also, to make it even more impressive, I come up with the digits of the result in proper order (not in reverse!)

How can I do this?

See The Solution Submitted by nellie

Rating: 3.3333 (6 votes)

Comments: ( You must be logged in to post comments.)

	Subject	Author	Date
	Puzzle Thoughts	K Sengupta	2023-05-17 23:09:02
	a solution?	mohan	2003-10-16 01:17:00
	re: gamer's reply	Gamer	2003-10-15 19:51:52
	gamer's reply	nellie	2003-10-15 13:23:50
	re: Mental Arithmetic	Gamer	2003-10-14 17:23:54
	Mental Arithmetic	nellie	2003-10-14 06:33:32
	re: none	mohan	2003-10-14 03:25:01
	none	Lee	2003-10-13 12:26:47
	solution	mohan	2003-10-13 04:45:20
	No Subject	mohan	2003-10-13 04:42:39
	re(2): solution	nellie	2003-10-12 11:26:22
	re: solution	mohan	2003-10-06 01:42:22
	a possible solution?	mohan	2003-10-06 01:32:25
	re: another path?	Gamer	2003-10-05 14:57:13
	re. another path?	Lee	2003-10-05 14:54:06
	another path?	Charlie	2003-10-05 14:36:43
	also	Lee	2003-10-05 14:23:41
	solution	Lee	2003-10-05 14:09:50
	solution	RoyCook	2003-10-05 12:58:01
	Another Clarification	Gamer	2003-10-05 12:27:18
	clarification	Charlie	2003-10-05 11:22:39

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