| 1. | Find the L.C.M. of 36, 48, 72 and 108. |
| a. | | 432 |
| b. | | 342 |
| c. | | 144 |
| d. | | 288
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| 2. | 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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| 3. | 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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| 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 L.C.M. of two number is 252 and their ratio is 6:7. Find the numbers. |
| a. | | 32, 49 |
| b. | | 16, 25 |
| c. | | 36, 42 |
| d. | | 54, 63
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| 6. | A room is 2.47m long and 2.09m broad. It is required to pave the floor with minimum square slabs. Find the number of slabs required for floor. |
| a. | | 143 |
| b. | | 361 |
| c. | | 142 |
| d. | | 165
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| 7. | Find the greatest number that will divide 378, 330 and 882 leaving remainders 3, 5 and 7 respectively. |
| a. | | 125 |
| b. | | 220 |
| c. | | 300 |
| d. | | 275
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| 8. | 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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| 9. | Which smallest number must be added to 605329 so that it becomes divisible by 9? |
| a. | | 3 |
| b. | | 5 |
| c. | | 2 |
| d. | | 7
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| 10. | Six bells tolling at the interval of 2, 4, 6, 8, 10, and 12 seconds respectively. In 30 minutes how many times they toll? |
| a. | | 4 |
| b. | | 10 |
| c. | | 15 |
| d. | | 16
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| 11. | Find the L.C.M. of 6/7, 12/13, 7/15. |
| a. | | 84 |
| b. | | 1/84 |
| c. | | 13 |
| d. | | 1/13
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| 12. | The sum and the differences of the L.C.M. and the H.C.F. of two numbers are 312 and 264, respectively. Find the numbers if their sum is 168. |
| a. | | 108, 84 |
| b. | | 92, 84 |
| c. | | 72, 84 |
| d. | | 96, 72
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| 13. | the greatest factor of 24 is |
| a. | | 56 |
| b. | | 20 |
| c. | | 12 |
| d. | | 36
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| 14. | what is the largest number that will divide 61, 33 and 75 leaving 5 as a remainder in each case |
| a. | | 66 |
| b. | | 55 |
| c. | | 097 |
| d. | | 14
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