In this Verbal and Logical Ability question, we need to correct the grammar of the underlined phrase in the given sentence: "A well-behaved boy is \(\underline{\text{always obedient for his parents}}\)". The provided options suggest different prepositions to follow the word "obedient".
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?
A shopkeeper marks his goods 40% above cost price and offers a 10% discount. What is his percentage profit?