We start with the left end of the number 553. Since 7 is larger than 5, we cannot get any 7's from the hundreds column, so we move to the next column. I know that 7 x 7 = 49, therefore we can get seven sevens out of 55. And since it is taken from the tens column, it's actually 70 sevens. We can't get eight sevens because 8 x 7 = 56 and 56 is larger than 55. So, if we subtract the 49 from the 55 we have 6 left over from the hundreds and tens columns combined (which is actually 60 left over, since it is in the tens column). Now we have one more column which contains the number 3, and 60 + 3 = 63, so we have 63 left over, in total. We can get nine sevens out of 63 because 9 x 7 = 63. So, therefore the complete answer is, 553/7 = 79.
553
9 times, with 13 left over
The rule being used here is probably a recursive one: xn+2 = xn + xn+1 + 2 For instance, 48 = 17 + 29 + 2. Thus the nextnumber is: 29 + 48 + 2 = 79 And the series can be extended indefinitely in both directions, if we like: ...-39, 21, -16, 7, -7, 2, -3, 1, 0, 3, 5, 10, 17, 29, 48, 79, 129, 210, 341, 553...
There are infinitely many multiples of 7, they start: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98, 105, 112, 119, 126, 133, 140, 147, 154, 161, 168, 175, 182, 189, 196, 203, 210, 217, 224, 231, 238, 245, 252, 259, 266, 273, 280, 287, 294, 301, 308, 315, 322, 329, 336, 343, 350, 357, 364, 371, 378, 385, 392, 399, 406, 413, 420, 427, 434, 441, 448, 455, 462, 469, 476, 483, 490, 497, 504, 511, 518, 525, 532, 539, 546, 553, 560, 567, 574, 581, 588, 595, 602, 609, 616, 623, 630, 637, 644, 651, 658, 665, 672, 679, 686, 693, 700, ...
7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98, 105, 112, 119, 126, 133, 140, 147, 154, 161, 168, 175, 182, 189, 196, 203, 210, 217, 224, 231, 238, 245, 252, 259, 266, 273, 280, 287, 294, 301, 308, 315, 322, 329, 336, 343, 350, 357, 364, 371, 378, 385, 392, 399, 406, 413, 420, 427, 434, 441, 448, 455, 462, 469, 476, 483, 490, 497, 504, 511, 518, 525, 532, 539, 546, 553, 560, 567, 574, 581, 588, 595, 602, 609, 616, 623, 630, 637, 644, 651, 658, 665, 672, 679, 686, 693, 700, 707, 714, 721, 728, 735, 742, 749, 756, 763, 770, 777, 784, 791, 798, 805, 812, 819, 826, 833, 840, 847, 854, 861, 868, 875, 882, 889, 896, 903, 910, 917, 924, 931, 938, 945, 952, 959, 966, 973, 980, 987, 994.
7.473
276.5
3.6867
184.3333
79
Square root of 553 is less, than 24, so we should only check the division by the numbers less than 24. 553 is not divided by 2, 3, 5, ... But, it is divided by 7, so, it is composite/
0.0018
553/23= 24.0434782...... So, no.
55 plus 553 is 608
7 x 79 = 553
553 feet = 16,855.44 centimeters
The number 553 in roman numerals is: DLIII