What number should replace the question mark?
7 9 4 5 43
8 7 3 3 47
10 4 4 7 12
12 5 4 2 ?
I'm posting one puzzle, riddle, math, or statistical problem a day. Try to answer each one and post your answers in the comments section. I'll post the answer the next day. Even if you have the same answer as someone else, feel free to put up your answer, too!
Friday, May 29, 2009
Fill in the Blank
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7 x 9 = 63 - (4 x 5) = 43
8 x 7 = 56 - (3 x 3) = 47
10 x 4 = 40 - (4 x 7) = 12
12 x 5 = 60 - (4 x 2) = 52
GandalfGecko, you are awesome. how did you manage to find out the ans soo soon? good job...ReplyDelete
i must be real bad in math to.
more jokes at http://grandfathersjoke.blogspot.com/ReplyDelete
A large truck is crossing a bridge 1 mile long. The bridge can only hold 14000 lbs, which is the exact weight of the truck. The truck makes it half way across the bridge and stops. A bird lands on the truck. Does the bridge collapse? Give a reason.
more at http://unscrambletheletters.blogspot.com/
Answer to AlexisReplyDelete
Nope. Becoz the truck would have burned fuel along the way. :)
(Ofcoz this is subject to the weight of the bird being = or < the weight of the amount of fuel that has been burned... =p)
Answer to the number thing:ReplyDelete
I think it's 1.5 (too tired to actually type up the calculations - srry)
Answer to the truck:
I agree with the anonymous comment before mine, in a way - I think that the truck actually ran out fuel (like, fully), and the bird replaced it ... maybe, i dunno, this one's a guess.
Answer to the truck one kinda depends on the weight of the bird but i would say the truck would collapse along with the bridge.ReplyDelete
as for the number answer i also agree that the answer is 52... (my calculation method was similar to that of GandalfGecko's...)
oh, 52 makes complete sense! I was getting into really complicated multiplication then subtracting all kinds of random answers! My brain turned to mush so I peeked at the comments and realized how off I was!!! :)ReplyDelete
The driver in the truck got out when the truck broke down to get help so there was weight room for the bird :D
Okay, I agree with Sarah for the truck one, and for the other one, I guess 1.5 or the rounded-off 2 might have been wrong - oops?ReplyDelete
Can't answer the math one... >_<ReplyDelete
But for alexis... I think the truck will collapse in its first move... Cause the truck weight is 14000 lbs + the driver + the bridge is no longer strong enough to hold 14000 lbs (except its new). So i think the truck will fall...
- Morenza Mayobi
52 is the answer. As several people pointed out, (12*5)-(4*2) = 52.ReplyDelete
oh..... my badReplyDelete