Three Digits in a Row

On a regular 12-hour digital clock how many times would the same three digits in a row be displayed (e.g. 1:11, 11:12, 12:22) in one day?

34 times. These 17 instances will be visible twice in a 24 hour period.

1:11
2:22
3:33
4:44
5:55
10:00
11:10
11:11
11:12
11:13
11:14
11:15
11:16
11:17
11:18
11:19
12:22

Posted in Brain Teasers

Wily Winifred and the Case of the Odd Numbers

Mrs. Shine was having a rough day and wanted a break. So she asked her class to calculate the sum of the first 50 odd numbers. In a few moments, Winifred was at her desk with the correct answer of 2,500. Stunned, Mrs. Shine figured she must have gotten lucky, and sent precocious Winifred back to her seat with the task of finding the sum of the first 75 odd numbers. Again, Winifred returned in seconds with the correct answer (5,625).

How did Winifred find the answer so quickly?

Winifred, being the precocious child she is, realized there was a pattern when computing smaller sums of odd numbers.

First 3: 1 + 3 + 5 = 9
First 4: 1 + 3 + 5 + 7 = 16
First 5: 1 + 3 + 5 + 7 + 9 = 25

Do you see the pattern like our dear friend Winnie?

For the first n odd numbers, the sum is equal to n2. Thus the first 50 is 502, or 2,500, and the first 75 is 752, or 5,625.

Posted in Brain Teasers

A Home But No Family

I have an end but no beginning, a home but no family, a space without room. I never speak but there is no word I cannot make. What am I?

A keyboard.

Posted in Riddles

2, 3, 6

What number comes next in this series?

2 3 6 7 1 9 4 5 ___

8. The numbers are in reverse alphabetical order.

Two, three, six, seven, one, nine, four, five, eight.

Posted in Brain Teasers

Rearrange My Letters To Be Clean

Rearrange these letters into something you can clean with.

boas

soap (by flipping the b upside down, similar to how IHOP became IHOb)

Posted in Brain Teasers

Remove My Middle And Still I Remain

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still I remain.

What word am I?

Empty. (mpt, emty or mt depending on your interpretation)

Posted in Riddles

Liquid Splashes But None Seeps Through

When liquid splashes me, none seeps through,
When I’m moved a lot, liquid I spew,
When I am hit, color I change,
And colors I come in, quite a range,
What I cover is quite complex,
Yet I am very easy to flex.

What am I?

Skin

Posted in Riddles
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You Can See Nothing Else

You can see nothing else
When you look in my face,
I will look you in the eye
And I will never lie.

What am I?

Your reflection.

Posted in Riddles
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Kings And Queens May Cling To Power

Kings and queens may cling to power
and the jester’s got his call
But, as you may all discover,
the common one outranks them all

An ace (in a deck of cards).

Posted in Riddles

Another Name for Shiva

My first three is another name for the Hindu god Shiva.
My last four create something to wear.
Together I might use a scythe.

What am I?

Harvest.

Har is another name for Shiva.
A vest is something you wear.
And a harvest might use a scythe.

Posted in Riddles
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