Problem: the least number which when increased by 5 each divisible by each one of 24 , 32 , 36 and 54 is :
Rationale: solution required number = ( l . c . m . of 24 , 32 , 36 , 54 ) - 5 = 864 - 5 = 859 . answer b
annotated_formula: subtract(lcm(lcm(lcm(24, 32), 36), 54), 5)