## Search found 36 matches

Mon Feb 15, 2016 2:24 am
Forum: Beginning Algebra
Topic: If 5,a,b are multiplied to form the product 5ab then...
Replies: 6
Views: 1471

### Re: If 5,a,b are multiplied to form the product 5ab then...

If b=0, then 5ab = 0.
Do you mean "if b=1" ?
Sun Nov 29, 2015 7:45 pm
Forum: Uncategorized
Topic: Number puzzle
Replies: 0
Views: 3979

### Number puzzle

Find the highest number where:

1: all digits are different

2: the sum of its digits is a 2digit number whose 2 digits do not appear in the number

Example:
number : 754
7 + 5 + 4 = 16 : 1 and 6 do not appear in 754
Thu Nov 05, 2015 12:58 am
Forum: Uncategorized
Topic: Tick tock!
Replies: 2
Views: 1207

### Re: Tick tock!

Thanks Maggie.

I knew the answer...put it up for people to try...
Spoiler:
1,11,708,719 = 1439
Those 2 sites only discuss the hour,minute.
A better site:
http://puzzling.stackexchange.com/quest ... on-a-clock
Wed Nov 04, 2015 7:51 pm
Forum: Uncategorized
Topic: Tick tock!
Replies: 2
Views: 1207

### Tick tock!

From Henry Dudeney to you: In a 12 hours period, starting exactly at 00.00, how often does: 1: the minute hand overlap the hour hand 2: the second hand overlap the hour hand 3: the second hand overlap the minute hand The clock works fine, so no tricks! Advertisement for clock repair shop: "If your c...
Wed Nov 04, 2015 12:50 am
Forum: Uncategorized
Topic: 7,7,7,7
Replies: 4
Views: 1160

### Re: 7,7,7,7

Yes, I do. Here's a slightly different kind: Use digits 1,2,3,4,5 once each and in ASCENDING order. Allowed: brackets, concatenation, + - / * ^ ! ; NOTHING else! Here's from 1 to 100: 1: 1^2345 2: 1^23 - 4 + 5 3: 123 - 4! * 5 4: -1^234 + 5 5: 1^234 * 5 6: 1^234 + 5 7: 123 + 4 - 5! 8: (12 * 3 + 4) / ...
Tue Nov 03, 2015 4:26 am
Forum: Uncategorized
Topic: 7,7,7,7
Replies: 4
Views: 1160

### Re: 7,7,7,7

Well, decided to use "squared":
7squared + 7squared - 7/.7 = 88
Mon Nov 02, 2015 3:52 pm
Forum: Intermediate Algebra
Topic: Writing rational expression in lowest term; help
Replies: 3
Views: 1411

### Re: Writing rational expression in lowest term; help

A few good teachers supplied by Google:
Mon Nov 02, 2015 3:49 pm
Forum: Forum Rules & Guides
Replies: 1
Views: 2541

WHY is it that I still need to log in every day?
Fri Oct 30, 2015 5:08 pm
Forum: Uncategorized
Topic: Need a loan?
Replies: 0
Views: 2307

### Need a loan?

I found this quite interesting: A loan of \$3000 over 24 months is obtained. The rate will be 9% annual compounded monthly for the 1st year, then 12% annual compounded monthly for the 2nd year. What is the required monthly payment over the 24 months? Part 2: a = 3000, u = .09/12, v = .12/12, p = mont...
Fri Oct 30, 2015 3:17 am
Forum: Uncategorized
Topic: 7,7,7,7
Replies: 4
Views: 1160

### Re: 7,7,7,7

Got 93: SUM[SUM(7)] / 7 + SUM(7) + 7

88 seems impossible...