229, 361, 493, and 625 are in arithmetic progression:

361 – 229 = 493 – 361 = 625 – 493 = 132

and the number of divisors of each is also in arithmetic progression: 84 more words

229, 361, 493, and 625 are in arithmetic progression:

361 – 229 = 493 – 361 = 625 – 493 = 132

and the number of divisors of each is also in arithmetic progression: 84 more words

**A**, **B**, **C**, and **D** form an arithmetic progression.

Let **d** be the common difference.

d = 1 ……..

d = 14 …… … 145 more words

**1487**, **4817**, and **8147** are prime numbers such that

>> Each of 4817 and 8147 is obtained by permuting the digits of 1487, and… 118 more words

An Oblong number is a number which is the product of two consecutive integers, that is, a number of the form

There exist infinitely many triplets of positive integers , for which the numbers… 84 more words

are chosen so that they form an arithmetic progression and

, , form a Chain of squares

Note the squares in columns and

Here are the first few solutions: 25 more words

with and in arithmetic sequence.

There are solutions of the form:

………. (1, 2, 3), (7, 8, 9)

………. (2, 4, 6), (14, 16, 18) 235 more words