Quantitative Aptitude - Arithmetic Ability Questions

A car moves at a speed of 72 km/hr after repairing and moves at the speed of 54 km/hr before repairing. It covers X distance in 6 hours after repairing. How much time (inhours) will it take to cover 3X distance before repairing?

If cos 45° - sec 60° = x, then the value of x is

A shopkeeper offers the following 3 schemes. Which scheme has the lowest discount percentage (all articles have same marked price)?

I. Two successive discounts of 10% and 10%

II. Buy 7 get 8

III. Buy 9 get 1 free

What is the HCF of 6345 and 2160?

If 3x - 4 > 2 - x/3 and 3x + 5 > 4x - 5; then find the value of x?

At 9.5% simple interest per annum a sum of money became Rs. 942 in 6 years. The sum initially invested was:

1st January 2018 was a Monday. Which of the following years will also start on a Monday?

Train A takes 45 minutes more than train B to travel a distance of 450 km. Due to engine trouble speed of train B falls by a quarter, so it takes 30 minutes more than Train A to complete the same journey. What is the speed of Train A (in km/hr)?