a) Letter value.
b) Nth and Nth last occurrences.
c) Total of letters between Nth and Nth last.
d) Total of letters not between Nth and Nth last.

a) 6
b) 6th and 6th last
c) 26873 = 7 x 11 x 349.
d) 31500 = 2 x 2 x 3 x 3 x 5 x 5 x 5 x 7.

a) 6
b) 11th and 11th last
c) 23121 = 3 x 3 x 7 x 367.
d) 35252 = 2 x 2 x 7 x 1259.

a) 6
b) 15th and 15th last
c) 17045 = 5 x 7 x 487.
d) 41328 = 2 x 2 x 2 x 2 x 3 x 3 x 7 x 41.

a) 6
b) 17th and 17th last
c) 14868 = 2 x 2 x 3 x 3 x 7 x 59.
d) 43505 = 5 x 7 x 11 x 113.

a) 6
b) 27th and 27th last
c) 4214 = 2 x 7 x 7 x 43.
d) 54159 = 3 x 7 x 2579.

a) 5
b) 6th and 6th last
c) 50456 = 2 x 2 x 2 x 7 x 17 x 53.
d) 7917 = 3 x 7 x 13 x 29. SF: 52 = 2 x 2 x 13.

a) 5
b) 7th and 7th last
c) 48825 = 3 x 3 x 5 x 5 x 7 x 31.
d) 9548 = 2 x 2 x 7 x 11 x 31.

a) 5
b) 8th and 8th last
c) 48223 = 7 x 83 x 83.
d) 10150 = 2 x 5 x 5 x 7 x 29.

a) 5
b) 9th and 9th last
c) 46088 = 2 x 2 x 2 x 7 x 823.
d) 12285 = 3 x 3 x 3 x 5 x 7 x 13.

a) 5
b) 14th and 14th last
c) 35672 = 2 x 2 x 2 x 7 x 7 x 7 x 13.
d) 22701 = 3 x 7 x 23 x 47.

a) 5
b) 18th and 18th last
c) 30968 = 2 x 2 x 2 x 7 x 7 x 79.
d) 27405 = 3 x 3 x 3 x 5 x 7 x 29.

a) 5
b) 22th and 22th last
c) 25403 = 7 x 19 x 191. SF: 217 = 7 x 31.
d) 32970 = 2 x 3 x 5 x 7 x 157.

a) 5
b) 43th and 43th last
c) 2576 = 2 x 2 x 2 x 2 x 7 x 23.
d) 55797 = 3 x 7 x 2657. SF: 2667 = 3 x 7 x 127.

a) 10
b) 6th and 6th last
c) 40740 = 2 x 2 x 3 x 5 x 7 x 97.
d) 17633 = 7 x 11 x 229. SF: 247 = 13 x 19.

a) 10
b) 7th and 7th last
c) 37982 = 2 x 7 x 2713.
d) 20391 = 3 x 7 x 971.

a) 10
b) 13th and 13th last
c) 29260 = 2 x 2 x 5 x 7 x 11 x 19.
d) 29113 = 7 x 4159.

a) 10
b) 20th and 20th last
c) 16940 = 2 x 2 x 5 x 7 x 11 x 11.
d) 41433 = 3 x 7 x 1973.

a) 10
b) 31th and 31th last
c) 7945 = 5 x 7 x 227.
d) 50428 = 2 x 2 x 7 x 1801.

a) 10
b) 34th and 34th last
c) 4053 = 3 x 7 x 193. SF: 203 = 7 x 29.
d) 54320 = 2 x 2 x 2 x 2 x 5 x 7 x 97. SF: 117 = 3 x 3 x 13.

a) 30
b) 18th and 18th last
c) 7707 = 3 x 7 x 367. SF: 377 = 13 x 29. SF: 42 = 2 x 3 x 7.
d) 50666 = 2 x 7 x 7 x 11 x 47.

a) 30
b) 20th and 20th last
c) 2422 = 2 x 7 x 173. SF: 182 = 2 x 7 x 13.
d) 55951 = 7 x 7993.

a) 20
b) 1st and 1st last
c) 52920 = 2 x 2 x 2 x 3 x 3 x 3 x 5 x 7 x 7.
d) 5453 = 7 x 19 x 41.

a) 20
b) 12th and 12th last
c) 11004 = 2 x 2 x 3 x 7 x 131.
d) 47369 = 7 x 67 x 101. SF: 175 = 5 x 5 x 7.

a) 40
b) 10th and 10th last
c) 39018 = 2 x 3 x 7 x 929.
d) 19355 = 5 x 7 x 7 x 79. SF: 98 = 2 x 7 x 7.

a) 40
b) 16th and 16th last
c) 32130 = 2 x 3 x 3 x 3 x 5 x 7 x 17.
d) 26243 = 7 x 23 x 163.

a) 40
b) 25th and 25th last
c) 21266 = 2 x 7 x 7 x 7 x 31.
d) 37107 = 3 x 3 x 7 x 19 x 31. SF: 63 = 3 x 3 x 7. SF: 13.

a) 40
b) 31th and 31th last
c) 16590 = 2 x 3 x 5 x 7 x 79.
d) 41783 = 7 x 47 x 127.

a) 40
b) 36th and 36th last
c) 8771 = 7 x 7 x 179.
d) 49602 = 2 x 3 x 7 x 1181.

a) 40
b) 37th and 37th last
c) 6062 = 2 x 7 x 433. SF: 442 = 2 x 13 x 17.
d) 52311 = 3 x 7 x 47 x 53.

a) 8
b) 2nd and 2nd last
c) 52374 = 2 x 3 x 7 x 29 x 43. SF: 84 = 2 x 2 x 3 x 7. SF: 14 = 2 x 7.
d) 5999 = 7 x 857.

a) 8
b) 10th and 10th last
c) 2121 = 3 x 7 x 101.
d) 56252 = 2 x 2 x 7 x 7 x 7 x 41.

a) 7
b) 3rd and 3rd last
c) 47103 = 3 x 7 x 2243.
d) 11270 = 2 x 5 x 7 x 7 x 23.

a) 4
b) 4th and 4th last
c) 29176 = 2 x 2 x 2 x 7 x 521.
d) 29197 = 7 x 43 x 97. SF: 147 = 3 x 7 x 7.

a) 2
b) 5th and 5th last
c) 16765 = 5 x 7 x 479.
d) 41608 = 2 x 2 x 2 x 7 x 743. SF: 756 = 2 x 2 x 3 x 3 x 3 x 7.

a) 200
b) 9th and 9th last
c) 43274 = 2 x 7 x 11 x 281. SF: 301 = 7 x 43.
d) 15099 = 3 x 7 x 719.

a) 200
b) 14th and 14th last
c) 32851 = 7 x 13 x 19 x 19.
d) 25522 = 2 x 7 x 1823.

a) 200
b) 22th and 22th last
c) 7798 = 2 x 7 x 557.
d) 50575 = 5 x 5 x 7 x 17 x 17.

a) 60
b) 3rd and 3rd last
c) 50939 = 7 x 19 x 383.
d) 7434 = 2 x 3 x 3 x 7 x 59.

a) 60
b) 4th and 4th last
c) 49623 = 3 x 7 x 17 x 139.
d) 8750 = 2 x 5 x 5 x 5 x 5 x 7.

a) 60
b) 11th and 11th last
c) 21070 = 2 x 5 x 7 x 7 x 43.
d) 37303 = 7 x 73 x 73.

a) 60
b) 16th and 16th last
c) 16527 = 3 x 7 x 787.
d) 41846 = 2 x 7 x 7 x 7 x 61. SF: 84 = 2 x 2 x 3 x 7. SF: 14 = 2 x 7.

a) 60
b) 17th and 17th last
c) 13811 = 7 x 1973.
d) 44562 = 2 x 3 x 7 x 1061.

a) 60
b) 21th and 21th last
c) 9065 = 5 x 7 x 7 x 37. SF: 56 = 2 x 2 x 2 x 7. SF: 13.
d) 49308 = 2 x 2 x 3 x 7 x 587.

a) 60
b) 23th and 23th last
c) 7616 = 2 x 2 x 2 x 2 x 2 x 2 x 7 x 17.
d) 50757 = 3 x 7 x 2417.

a) 60
b) 25th and 25th last
c) 6328 = 2 x 2 x 2 x 7 x 113. SF: 126 = 2 x 3 x 3 x 7.
d) 52045 = 5 x 7 x 1487.

a) 80
b) 14th and 14th last
c) 6342 = 2 x 3 x 7 x 151.
d) 52031 = 7 x 7433.

a) 1
b) 12th and 12th last
c) 45444 = 2 x 2 x 3 x 7 x 541.
d) 12929 = 7 x 1847.

a) 1
b) 26th and 26th last
c) 26075 = 5 x 5 x 7 x 149.
d) 32298 = 2 x 3 x 7 x 769.

a) 1
b) 34th and 34th last
c) 13349 = 7 x 1907.
d) 45024 = 2 x 2 x 2 x 2 x 2 x 3 x 7 x 67.

a) 1
b) 41th and 41th last
c) 4284 = 2 x 2 x 3 x 3 x 7 x 17.
d) 54089 = 7 x 7727.

a) 70
b) 1st and 1st last
c) 52773 = 3 x 7 x 7 x 359.
d) 5600 = 2 x 2 x 2 x 2 x 2 x 5 x 5 x 7.

a) 70
b) 12th and 12th last
c) 13755 = 3 x 5 x 7 x 131.
d) 44618 = 2 x 7 x 3187.

a) 70
b) 14th and 14th last
c) 11557 = 7 x 13 x 127. SF: 147 = 3 x 7 x 7.
d) 46816 = 2 x 2 x 2 x 2 x 2 x 7 x 11 x 19.

a) 100
b) 2nd and 2nd last
c) 48755 = 5 x 7 x 7 x 199.
d) 9618 = 2 x 3 x 7 x 229.

a) 100
b) 6th and 6th last
c) 20244 = 2 x 2 x 3 x 7 x 241.
d) 38129 = 7 x 13 x 419.

a) 100
b) 8th and 8th last
c) 17059 = 7 x 2437. SF: 2444 = 2 x 2 x 13 x 47.
d) 41314 = 2 x 7 x 13 x 227.

a) 100
b) 19th and 19th last
c) 2758 = 2 x 7 x 197.
d) 55615 = 5 x 7 x 7 x 227.

a) 90
b) 1st and 1st last
c) 45115 = 5 x 7 x 1289.
d) 13258 = 2 x 7 x 947.

a) 90
b) 2nd and 2nd last
c) 38213 = 7 x 53 x 103.
d) 20160 = 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 5 x 7.

a) 90
b) 4th and 4th last
c) 30716 = 2 x 2 x 7 x 1097.
d) 27657 = 3 x 3 x 7 x 439.

a) 90
b) 9th and 9th last
c) 19411 = 7 x 47 x 59.
d) 38962 = 2 x 7 x 11 x 11 x 23.

a) 90
b) 15th and 15th last
c) 9702 = 2 x 3 x 3 x 7 x 7 x 11.
d) 48671 = 7 x 17 x 409.

a) 90
b) 19th and 19th last
c) 1617 = 3 x 7 x 7 x 11. SF: 28 = 2 x 2 x 7.
d) 56756 = 2 x 2 x 7 x 2027.

a) 9
b) 1st and 1st last
c) 33691 = 7 x 4813.
d) 24682 = 2 x 7 x 41 x 43.

a) 9
b) 2nd and 2nd last
c) 24801 = 3 x 7 x 1181.
d) 33572 = 2 x 2 x 7 x 11 x 109.

a) 9
b) 16th and 16th last
c) 7875 = 3 x 3 x 5 x 5 x 5 x 7. SF: 28 = 2 x 2 x 7.
d) 50498 = 2 x 7 x 3607.

a) 9
b) 17th and 17th last
c) 7175 = 5 x 5 x 7 x 41.
d) 51198 = 2 x 3 x 7 x 23 x 53.