### Robert House Peters Jr. Dead at Age 92 (about ninety-two)

Robert House Peters Jr. died at the age of 92 on 1 October 2008.

Peters Jr. was the original Mr. Clean from the late 1950s to the early 1960s. {video}

```   MathBabbler Number Analyst (MBNA) output:
=========================================
92 is a natural, whole, integer
92 is even
92 proper divisors are: 1,2,4,23,46,
92 is deficient (sum of divisors is 76)
92 is unhappy
92 is not a Harshad number
92 is not prime
92 is undulating
92 has the prime factors: 2*2*23
92 in octal is 0134
92 in hexadecimal is 0x5c
92 in binary is 1011100 (is evil)
92 nearest square numbers: -11...8 (81 ...100 )
sqrt(92) = 9.59166
ln(92) = 4.52179
log(92) = 1.96379
92 reciprocal is .01086956521739130434782608695652
92! is 1.24384e+142
92 is 29.2845 Pi years
92 is 4 score and 12 years
```

`92` in Roman numeral is XCII.

MathBabbler likes doing the MAT0`92` (Beginning Algebra) course at SCC.

MathBabbler first... via the Wikipedia...

`92` is a pentagonal number. The test for a pentagonal numer is as follows.

```   n = (sqrt(24x + 1) + 1) / 6

if 'n' is a natural number, then 'x' is pentagonal;
otherwise, 'x' is not pentagonal

test if 92 is pentagonal...

n = (sqrt(24(92) + 1) + 1) / 6
n = (sqrt(2208  + 1) + 1) / 6
n = (sqrt(2209) + 1) / 6
n = (47 + 1) / 6
n = 48 / 6
n = 8

8 is a natural number; therefore, 92 is pentagonal
```

The sequence of pentagonal number is calculated as follows.

```   pn = (n(3(n) - 1)) / 2, where n ≥ 1

p1 = (1(3(1) - 1)) / 2 = 1
p2 = (2(3(2) - 1)) / 2 = 5
p3 = (3(3(3) - 1)) / 2 = 12
...
p8 = (8(3(8) - 1)) / 2 = 92
```
##### Update::2009.07.17

Walter Cronkite died on 17 July 2009 at the age of `92`. For many years Walter Cronkite was considered the "most trusted man in America." Cronkite ended the CBS Evening News with the phrase "...And that's the way it is."

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 06 October 2008 