JSFiddle

Gabriele's public fiddles

• PHUUa

jQuery 1.4.4, HTML, CSS, JavaScript

• nLRB9

jQuery 1.4.4, HTML, CSS, JavaScript

• YzPeH

jQuery 1.4.4, HTML, CSS, JavaScript

• hsv97

jQuery 1.4.4, HTML, CSS, JavaScript

• 3trV2

No-Library (pure JS), HTML, CSS, JavaScript

• G6NP5

No-Library (pure JS), HTML, CSS, JavaScript

• B8FdQ

No-Library (pure JS), HTML, CSS, JavaScript

• UXNs2

No-Library (pure JS), HTML, CSS, JavaScript

• 3Lu4h

Mootools 1.3 (compat), HTML, CSS, JavaScript

• s8XZQ

Mootools 1.3 (compat), HTML, CSS, JavaScript

• cdFUU

Mootools 1.3 (compat), HTML, CSS, JavaScript

• mgDqx

jQuery 3.3.1, HTML, CSS, JavaScript

• rfGv8

Mootools 1.3 (compat), HTML, CSS, JavaScript

• 2ZXhJ

Mootools 1.3 (compat), HTML, CSS, JavaScript

• zWhNL

Mootools 1.3 (compat), HTML, CSS, JavaScript

• DuQGk

Mootools 1.3 (compat), HTML, CSS, JavaScript

• Wqr8X

Mootools 1.3 (compat), HTML, CSS, JavaScript

• 7br93

Mootools 1.3 (compat), HTML, CSS, JavaScript

• Problem 12

he sequence of triangle numbers is generated by adding the natural numbers. So the 7^(th) triangle number would be 1 + 2 + 3 + 4 + 5 + 6 + 7 = 28. The first ten terms would be: 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, ... Let us list the factors of the first seven triangle numbers: 1: 1 3: 1,3 6: 1,2,3,6 10: 1,2,5,10 15: 1,3,5,15 21: 1,3,7,21 28: 1,2,4,7,14,28 We can see that 28 is the first triangle number to have over five divisors. What is the value of the first triangle number to have over five hundred divisors?

• Problem 11

In the 20×20 grid below, four numbers along a diagonal line have been marked in red. 08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08 49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 00 81 49 31 73 55 79 14 29 93 71 40 67 53 88 30 03 49 13 36 65 52 70 95 23 04 60 11 42 69 24 68 56 01 32 56 71 37 02 36 91 22 31 16 71 51 67 63 89 41 92 36 54 22 40 40 28 66 33 13 80 24 47 32 60 99 03 45 02 44 75 33 53 78 36 84 20 35 17 12 50 32 98 81 28 64 23 67 10 26 38 40 67 59 54 70 66 18 38 64 70 67 26 20 68 02 62 12 20 95 63 94 39 63 08 40 91 66 49 94 21 24 55 58 05 66 73 99 26 97 17 78 78 96 83 14 88 34 89 63 72 21 36 23 09 75 00 76 44 20 45 35 14 00 61 33 97 34 31 33 95 78 17 53 28 22 75 31 67 15 94 03 80 04 62 16 14 09 53 56 92 16 39 05 42 96 35 31 47 55 58 88 24 00 17 54 24 36 29 85 57 86 56 00 48 35 71 89 07 05 44 44 37 44 60 21 58 51 54 17 58 19 80 81 68 05 94 47 69 28 73 92 13 86 52 17 77 04 89 55 40 04 52 08 83 97 35 99 16 07 97 57 32 16 26 26 79 33 27 98 66 88 36 68 87 57 62 20 72 03 46 33 67 46 55 12 32 63 93 53 69 04 42 16 73 38 25 39 11 24 94 72 18 08 46 29 32 40 62 76 36 20 69 36 41 72 30 23 88 34 62 99 69 82 67 59 85 74 04 36 16 20 73 35 29 78 31 90 01 74 31 49 71 48 86 81 16 23 57 05 54 01 70 54 71 83 51 54 69 16 92 33 48 61 43 52 01 89 19 67 48 The product of these numbers is 26 × 63 × 78 × 14 = 1788696. What is the greatest product of four adjacent numbers in any direction (up, down, left, right, or diagonally) in the 20×20 grid?