Math and logic riddle thread

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↑ malki2 ↓

Tue, Oct 13 2020, 6:19 pm

doodlesmom wrote:

Hidden:

Per my calculator

That’s how many minutes. But remember that there are only 60 seconds in a minute.

↑ ChanieMommy ↓

Tue, Oct 13 2020, 6:20 pm

malki2 wrote:

Yes! 🎉🎉👏👏👏

Even though I did not solve it like that!

I think this off by a factor of 5 or so

Because the result you obtain would be between 5 and 6 pm...and we agreed it wbetween 1:05 and 1:06 pm...

↑ malki2 ↓

Tue, Oct 13 2020, 6:24 pm

ChanieMommy wrote:

I think this off by a factor of 5...

No, the answer is 1:05 and 27 seconds and 45 hundredths.

↑ ChanieMommy ↓

Tue, Oct 13 2020, 6:28 pm

malki2 wrote:

No, the answer is 1:05 and 27 seconds and 45 hundredths.

No,

Hidden:

↑ malki2 ↓

Tue, Oct 13 2020, 6:30 pm

Algebraically, you can solve it like this:

Starting from noon, both hands travel different distances at different rates, but for the same amount of time. D=R*T, so T=D/R. Since the times are equal (because they will meet at that time) so D/R (hour hand) = D/R (min. hand).
D (hour hand)= X
D (min. hand)= 60+X
R (hour hand)= 5/hour
R (min hand)= 60/hour

so, X/5 = (60+X)/60
and 60X = 300 + 5X
and X = 300/55 = 5.4545 minutes =5 minutes, 27.45 seconds

↑ malki2 ↓

Tue, Oct 13 2020, 6:32 pm

ChanieMommy wrote:

No,

Hidden:

No because it is .45 of a minute, and .45 of a second. The seconds are divided into 100, not 60.

↑ ChanieMommy ↓

Tue, Oct 13 2020, 6:36 pm

malki2 wrote:

In your last line, there is conversion error...

5.45454545 minutes is not 5 min 27.45 seconds, but 5 minutes 27.27 seconds

↑ ExtraCredit ↓

Tue, Oct 13 2020, 6:38 pm

I feel like Hillel stuck in the snow looking in through the skylight how 2 giants in math are arguing.

↑ malki2 ↓

Tue, Oct 13 2020, 6:40 pm

ChanieMommy wrote:

Inyour last line, there is conversion error...

5.45454545 minutes is not 5 min 27,45 seconds, but 5 minutes 27.27 seconds

You are correct. Conversion error.

↑ doodlesmom ↓

Tue, Oct 13 2020, 6:46 pm

I told you I need help with the math....I do the logic...

↑ malki2 ↓

Tue, Oct 13 2020, 6:47 pm

doodlesmom wrote:

I told you I need help with the math....I do the logic...

Good logic

↑ doodlesmom ↓

Tue, Oct 13 2020, 6:59 pm

What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?

↑ ExtraCredit ↓

Tue, Oct 13 2020, 7:03 pm

doodlesmom wrote:

What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?

Hidden:

↑ ExtraCredit ↓

Tue, Oct 13 2020, 7:04 pm

Finally one I can solve today. Or maybe the second.

↑ doodlesmom ↓

Tue, Oct 13 2020, 7:04 pm

ExtraCredit wrote:

Hidden:

Yay!

↑ shanie5 ↓

Tue, Oct 13 2020, 7:16 pm

doodlesmom wrote:

What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?

Hidden:

↑ Tamari ↓

Tue, Oct 13 2020, 7:20 pm

Is there no in-between here? Either ultra challenging, or fifth-grade level?
C'mon!!! Lemme have something GOOD!

↑ ChanieMommy ↓

Tue, Oct 13 2020, 7:22 pm

doodlesmom wrote:

What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?

Iwould say:

Hidden:

↑ tothepoint ↓

Tue, Oct 13 2020, 7:41 pm

doodlesmom wrote:

What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?

Hidden:

↑ doodlesmom ↓

Tue, Oct 13 2020, 7:42 pm

123=0
4235=0
656=2
5390=2
8890=6
1001=2
19235=1
What is 123456789?

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