Let Adamu's monthly allowance be represented by A.
From the given information, he spends 3/5 of his monthly allowance on food and 1/4 on learning materials.
Therefore, he spends (3/5)A on food and (1/4)A on learning materials.
The amount he spends on food and learning materials is N330 less than his allowance, so we can write the equation (3/5)A + (1/4)A = A - N330.
Multiplying through by 20 to eliminate the fractions, we get 12A + 5A = 20A - 6600.
Simplifying, we have 17A = 20A - 6600.
Combining like terms, we have 3A = 6600.
Dividing both sides by 3, we get A = 6600/3 = N2200.
Therefore, Adamu's monthly allowance is N2200. Answer: \boxed{2200}.
1. Adamu spends 3/5 of his monthly allowance on food and 1/4 on learning materials. If the amount he spends on food and learning materials is N330 less than his allowance, how much is his monthly allowance?
1 answer