Quantitative Aptitude - Arithmetic Ability Questions

S, T and U together can complete a work in 30 days. If the ratio of efficiency of S, T and U is 20 : 15 : 12 respectively, then in how many days U alone can complete the same work?

Every month, Kritika spends 30% of her income on house rent and 60% of the rest on household expenditure. If she saves ₹ 6300 per month, what is her total monthly income?

A number is increased by 84, it becomes 107% of itself. What is the number?

A rice trader buys 16 quintals of rice for Rs 5632. 20% rice is lost in transportation. At what rate should he sell to earn 25% profit?

3rd January 2018 was a Wednesday. Which of the following years will also have 3rd January on a Wednesday?

If 6A = 11B = 7C; find A : B : C

Ifx4 + (1/x4) = 34, then what is the value of x3 – (1/x3)?

Amit donated 20% of his income to a school and deposited 20% of the remainder in his bank. If he is having Rs 12800 now, then what is the income (in Rs) of Amit?