1.

Find the least number which when divided by 20, 30 , 40 leaves a remainder of 7 in each case.

Answer»

2 |20,30,40
2 |10,15,20
2 |5,15,10
5 |5,15,5
|1,3,1 Least Common MULTIPLE of 20,30,40 is 120. remainder is GIVEN as 7.So ANSWER is 120+7=127.



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