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The smallest number when increased by ” 1 ” is exactly divisible by 12, 18, 24, 32 and 40 is__________?

/ Mathematics Mcqs, Problems on L.C.M and H.C.F / By
The smallest number when increased by ” 1 ” is exactly divisible by 12, 18, 24, 32 and 40 is__________?

A. 1439
B. 1440
C. 1459
D. 1449
Explanation:
LCM = 1440
1440 – 1 = 1439