Mental Arithmetic (Posted on 2003-10-05)

	Submitted by nellie
Rating: 3.3333 (6 votes)
Solution:	(Hide)
METHOD: 1667 is not used. The calculation uses your number only. It involves division not multiplication and hence the answer starts with the most significant digit. Divide your number by 6. This gives the first 2 or 3 digits of the answer. Multiply the remainder by 5. Put this remainder by 5 in front of your original number and divide by 3. This gives the rest of the answer. Example 1667 x 872 Divide 872 by 6 = 145 remainder 2 Mutiply remainder by 5 = 10 Put in front of number and divide by 3 10872/3 = 3624 Thus 1667 x 872 = 1453624 Look here for RoyCook's solution, look here for Gamer's solution, look here for mohan's solution.

	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