Questions

[cksghdrla2]

6-1-(1/6)-(1/36)... formula?

there are 8 elements. how many proper subsets are there with at least one element? isn this 255? the answer said 254.

[ziqidavidli]

[stupidityismygam]

[ziqidavidli]

Questions:

These are all from 2007 UIL SAC
Please show me the shortcuts if there are any. Thanks. :)
#13 [unparseable or potentially dangerous latex formula]

ANS: [unparseable or potentially dangerous latex formula]

#32 [unparseable or potentially dangerous latex formula]

ANS: 2091

#34 [unparseable or potentially dangerous latex formula] has a remainder of:

ANS: 2

#39 [unparseable or potentially dangerous latex formula]

ANS: 1111

#48 [unparseable or potentially dangerous latex formula]

ANS: 44912

*#50 [unparseable or potentially dangerous latex formula] (estimation)

ANS: 86569-95681

#62 [unparseable or potentially dangerous latex formula]

ANS: [unparseable or potentially dangerous latex formula]

#*70 [unparseable or potentially dangerous latex formula] (estimation)

ANS: 4365-4824

#72 The smaller root of [unparseable or potentially dangerous latex formula] is

ANS: [unparseable or potentially dangerous latex formula]

and finally...

#77 [unparseable or potentially dangerous latex formula]

ANS: [unparseable or potentially dangerous latex formula]

[stupidityismygam]

13) Improper fractioning it seems helpful

32) LIOF with [unparseable or potentially dangerous latex formula] as a tens digit

34) Modular arithmetic. Essentially you can replace all those numbers with their remainder when divided by 7 to simplify the process.
So, [unparseable or potentially dangerous latex formula] with mod 7 just meaning the remainder when divided by 7.

39) Multiplying by 9 has some interesting patterns, this is one of them. [unparseable or potentially dangerous latex formula]

48) [unparseable or potentially dangerous latex formula]

50) [unparseable or potentially dangerous latex formula]

62) [unparseable or potentially dangerous latex formula] So, [unparseable or potentially dangerous latex formula]

70) [unparseable or potentially dangerous latex formula]

72) [unparseable or potentially dangerous latex formula]

77) [unparseable or potentially dangerous latex formula]

[ziqidavidli]

[stupidityismygam]

50) [unparseable or potentially dangerous latex formula][unparseable or potentially dangerous latex formula]

[SumitG]

The intense rounding way:
50)[unparseable or potentially dangerous latex formula]
Also, methinks Stephen's missing a 0?

[stupidityismygam]