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Number X is a common multiple of 8 and 7. It is between 1100 and 1200. What is number X?
  • a)
    1144
  • b)
    1197 
  • c)
    1120
  • d)
    1136
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Number X is a common multiple of 8 and 7. It is between 1100 and 1200....
The least common multiple of 8 and 7 is given by 8 * 7 = 56
We need to determine the number A which is a common multiple of 8 and 9. It is also given that the number A is between 1200 and 1300.
The multiples of 8 between the range 1100 and 1200 is given by
1104, 1112, 1120, 1128, 1136, 1144, 1152, 1160, 1168, 1176, 1184, 1192, 1200.
The multiples of 7 between the range 1100 and 1200 is given by
1106, 1113, 1120, 1127, 1134, 1141, 1148, 1155, 1162, 1169, 1176, 1183, 1190 and 1197
It is obvious from the multiples of 8 and 7, the common multiple is 1120.
Thus, the number A is 1120.
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Most Upvoted Answer
Number X is a common multiple of 8 and 7. It is between 1100 and 1200....
Solution:

To find the common multiple of 8 and 7, we need to list down the multiples of both the numbers and find the smallest number that appears in both the lists.

Multiples of 8: 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, 128, 136, 144, 152, 160, 168, 176, 184, 192, 200, 208, 216, 224, 232, 240, 248, 256, 264, 272, 280, 288, 296, 304, 312, 320, 328, 336, 344, 352, 360, 368, 376, 384, 392, 400, 408, 416, 424, 432, 440, 448, 456, 464, 472, 480, 488, 496, 504, 512, 520, 528, 536, 544, 552, 560, 568, 576, 584, 592, 600, 608, 616, 624, 632, 640, 648, 656, 664, 672, 680, 688, 696, 704, 712, 720, 728, 736, 744, 752, 760, 768, 776, 784, 792, 800, 808, 816, 824, 832, 840, 848, 856, 864, 872, 880, 888, 896, 904, 912, 920, 928, 936, 944, 952, 960, 968, 976, 984, 992, 1000, 1008, 1016, 1024, 1032, 1040, 1048, 1056, 1064, 1072, 1080, 1088, 1096.

Multiples of 7: 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,
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Number X is a common multiple of 8 and 7. It is between 1100 and 1200. What is number X?a)1144b)1197c)1120d)1136Correct answer is option 'C'. Can you explain this answer?
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