Quantitative Aptitude - Arithmetic Ability Questions

If 3/4 of the weight of a brick is 7/8 kg, then 5/7 of the weight of the brick will be

What approximate value should come in place of the question mark (?) in the following questions? (You are not expected to calculate the exact value.)

21.003 × 39.998 –209.91 = 126× ?

If a - b = 10 and ab =-21, then what is the value of a3-b3 ?

If a/b = c/d = e/f = 2/5, then what is (5a + 3c + 2e) : (5b + 3d + 2f)?

The number 3521is divided by 8. What is the remainder?

Sum of twice a fraction and its reciprocal is 17/6. What is the fraction?

The costs of daily ticket of local train is Rs 130 and Monthly Pass costs Rs 3091.40. If I buy the Monthly Pass and travel for 29 days in a month than I save (in percentage)?

The ratio of three numbers is 2 : 3 : 5. If the sum of the three numbers is 275, then what is the largest among the three numbers?