Quantitative Aptitude - Arithmetic Ability Questions

The average temperature of Monday ,Tuesday , Wednesday and Thursday is 60°, The average for Tuesday, Wednesday, Thursday and Friday is 63°; If the ratio of temperature for Monday and Friday is 21 : 25, then what is the temperature of Friday ?

A Rs 1000 box of cookies is offered at 10% discount and a Rs 400 bar of chocolate at 8% discount. If we buy 2 boxes of cookies and 3 bars of chocolate, what is the effective discount we get (in %)?

If 2/3(6x/5 - 1/4) + 1/3 = 9x/5, then what is the value of x?

If A has got 20% more marks than B, then by what percent marks of B are less than the marks of A?

If Cos θ = 15/17 , then what is the value of Cosec θ?

Two motorcycles are moving towards each other with the speeds of 38 km/hr and 88 km/hr respectively. One second before the collision what will be the distance (in metres) between the two motorcycles?

If Mohan purchase 13 articles for Rs 12 and sells all the articles at the rate of 12 articles for Rs 13, then what will be the profit percentage?

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