This Question Has 2 Parts That Don't Even Match. I Don't Know Why.

**Part A:**

If two consecutive whole numbers have a different number of digits, then their product must be a multiple of...

**Answer Choices**

4

11

15

100

**Part B:**

Last month I spent $24 on magnets that cost 80 cents each, and this monthI spent $24 on magnets that cost $1.20 each. The average cost per magnet was...

*Answer Choices*

92 __cents__

96 __cents__

$1

$1.04

Thanks for your time and help!

APatel Jan 24, 2019

#1**+1 **

9 x 10 = 90 divisible by 15

99 x 100 = 9900 divisible by 4 and 15

999 x 1000 = 999 000 divisible by 4 and 15 see a pattern here?

B: 2400 cents /80 cents/magnet = 30 magnets 2400/120 = 20 magnets

4800 total / (30 + 20 magnets) = 96 cents/magnet

ElectricPavlov Jan 24, 2019

#3**+1 **

There might be some magnetic interference. You know, from all the magnets in the other question ... LOL

Guest Jan 25, 2019

#4**+1 **

Well yah......22.5 it's just not a 'factor' ooops....fixed..

.Miscopied from my scratch pad....

ElectricPavlov
Jan 25, 2019

#5**+1 **

No, the factor that is in all the products is 15, which is why it is highlighted.

PartialMathematician
Jan 25, 2019