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# Subtraction

64 replies to this topic

### #1 rookie1ja

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Posted 31 March 2007 - 11:06 AM

Subtraction - Back to the River Crossing Puzzles
How many times can you subtract the number 2 from the number 32?

This old topic is locked since it was answered many times. You can check solution in the Spoiler below.
Pls visit New Puzzles section to see always fresh brain teasers.

Spoiler for Solution

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### #2 global_cooler

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Posted 24 April 2007 - 09:08 AM

ha...
ha...
good one.
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### #3 Grujah

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Posted 27 April 2007 - 03:38 PM

Well, you can subtract 2 from 32 as many times as you want.
32 - 2 = 30 (first time)
32 - 2 = 30 (second time)

and so on...
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### #4 pranavojha

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Posted 24 May 2007 - 02:01 PM

hehehe....
even more funny!!
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### #5 strikefiend

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Posted 14 June 2007 - 07:49 PM

My answer is once, because "32" without the "2" would be "3" and you can't remove a "2" from a "3".
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### #6 harvey45

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Posted 21 June 2007 - 08:34 PM

If you only want to work w/ positive #s, 2 can be substracted frrom 32 16 times till you get to 0:
30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0

Otherwise you can subtract 2 from 32 an unlimited # of times. Just go into negatives:
10, 8, 6, 4, 2, 0, -2, -4, -6, -8, -10
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### #7 larryhl

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Posted 21 June 2007 - 09:13 PM

If you only want to work w/ positive #s, 2 can be substracted frrom 32 16 times till you get to 0:
30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0

Otherwise you can subtract 2 from 32 an unlimited # of times. Just go into negatives:
10, 8, 6, 4, 2, 0, -2, -4, -6, -8, -10

You don't seem to get the gist of the riddle. It's not a math problem. You can only subtract 2 from 32 once because after that you are subtracting 2 from a number that isn't 32.
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### #8 rofel_2612

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Posted 26 June 2007 - 09:52 AM

I Agree with Grujah.
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### #9 Camshaft

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Posted 03 July 2007 - 07:04 PM

Infinite

32-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2...
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### #10 mathemagister

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Posted 06 July 2007 - 10:46 AM

That reminds me of these riddles:
How many cookies can you eat with an empty stomach? 1!
How many books can fit in an empty schoolbag? 1!
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