| 1. | The H.C.F and L.C.M. of any two numbers are 2079 and 27 respectively. If one of the two number is 189, find the other number. |
| a. | | 309 |
| b. | | 297 |
| c. | | 180 |
| d. | | 327
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| 2. | Find the greatest number that will divide 296, 492 and 1246 leaving remainders 8, 12 and 22 respectively |
| a. | | 12 |
| b. | | 36 |
| c. | | 24 |
| d. | | 48
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| 3. | Find the least number which when divided by 36, 48 and 54 which will leaves the same remainder 7. |
| a. | | 436 |
| b. | | 432 |
| c. | | 437 |
| d. | | 439
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| 4. | Which of the following is a pair of co-primes? |
| a. | | (32,52) |
| b. | | (16,28) |
| c. | | (18,35) |
| d. | | (21,42)
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| 5. | The H.C.F and L.C.M. of any two numbers are 2040 and 170 respectively. If one of the two number is 510, find the other number. |
| a. | | 255 |
| b. | | 340 |
| c. | | 680 |
| d. | | 260
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| 6. | Which smallest number must be added to 9373 so that it exactly divisible by 4? |
| a. | | 3 |
| b. | | 2 |
| c. | | 5 |
| d. | | 7
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| 7. | Find the least number which on adding 7 is exactly divisible by each of 15, 35 and 48. |
| a. | | 1663 |
| b. | | 1673 |
| c. | | 2093 |
| d. | | 1385
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| 8. | Find the greatest number which will divide 400, 435 and 541 leaving remainder 9, 10 and 14 respectively. |
| a. | | 16 |
| b. | | 15 |
| c. | | 13 |
| d. | | 17
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| 9. | Which of the following pairs of numbers is not co-prime? |
| a. | | 15, 98 |
| b. | | 198, 429 |
| c. | | 847, 2160
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| 10. | The product of H.C.F. and L.C.M. of two numbers is 9072. If one of the numbers is 72, find the other number? |
| a. | | 105 |
| b. | | 112 |
| c. | | 126 |
| d. | | 165
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| 11. | The H.C.F. and L.C.M. of two numbers are 12 and 5040 respectively. If one of the numbers is 144, find the other number? |
| a. | | 420 |
| b. | | 425 |
| c. | | 465 |
| d. | | 412
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| 12. | The L.C.M. of two numbers is 45 times to their H.C.F. If one of the numbers is 125 and sum of L.C.M. and H.C.F. is 1150, find the other number? |
| a. | | 215 |
| b. | | 220 |
| c. | | 225 |
| d. | | 235
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