Multiplication & Division 13's x 20

Card Set Properties

Title:	Multiplication & Division 13's x 20
Description:	Card set includes multiples of 13 from 13x1 up to 13x20; and, division by 13 from 260/13 down to 13/13. Also includes quick formula to determine when larger numbers are divisible by 13.
Number of Cards:	41
Author:	PJohnstun
Created:	2006-09-14
Tags:	13's arithmetic division math multiplication
Private:	No
Favorite Count:	6
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Flashcard list for: Multiplication & Division 13's x 20

	Question	Answer	Note/Hint
	13 x 1 =	13
	13 x 2 =	26
	13 x 3 =	39
	13 x 4 =	52
	13 x 5 =	65
	13 x 6 =	78
	13 x 7 =	91
	13 x 8 =	104
	13 x 9 =	117
	13 x 10 =	130
	13 x 11 =	143
	13 x 12 =	156
	13 x 13 =	169
	13 x 14 =	182
	13 x 15 =	195
	13 x 16 =	208
	13 x 17 =	221
	13 x 18 =	234
	13 x 19 =	247
	13 x 20 =	260
	260 / 13 =	20
	247 / 13 =	19
	234 / 13 =	18
	221 / 13 =	17
	208 / 13 =	16
	195 / 13 =	15
	182 / 13 =	14
	169 / 13 =	13
	156 / 13 =	12
	143 / 13 =	11
	130 / 13 =	10
	117 / 13 =	9
	104 / 13 =	8
	91 / 13 =	7
	78 / 13 =	6
	65 / 13 =	5
	52 / 13 =	4
	39 / 13 =	3
	26 / 13 =	2
	13 / 13 =	1
	When is a number divisible by 13 ?	A number is divisible by 13 when the product of the units digit X 4 + all remaining digits equals a number that is divisible by 13 with no remainder. Ex. 273 is divisible by 13 because 3 x 4 = 12, 12 + 27 = 39. 39 is divisible by 13 with no remainder.

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