A) 1394
B) 1404
C) 1664
D) 1406
Correct Answer: A
Solution :
The smallest number which is exactly divisible by 20, 25, 35 and 40 is their LCM. \[\therefore \] LCM \[=2\times 2\times 2\times 5\times 5\times 7\] \[=1400\]2 | 20, 25, 35, 40 |
2 | 10, 25, 35, 20 |
2 | 5, 25, 35, 10 |
5 | 5, 25, 35, 5 |
5 | 1, 5, 7, 1 |
7 | 1, 1, 7, 1 |
1, 1, 1, 1 |
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