Quantitative Aptitude - Arithmetic Ability Questions

The first and last terms of an arithmetic progression are 23 and ­42. What is the sum of the series if it has 14 terms?

Raj takes 2 1/3 hrs to complete a certain distance at a speed of 51 kmph. What time would Kiran take to complete the same distance at a speed of 68kmph?

In the first 38 overs of a cricket match, the run rate was 4.5 runs/over. Calculate the required run rate in the remaining 12 overs to reach the target of 288 runs?

To travel 660 km, an Express train takes 10 hours more than Rajdhani. If however, the speed of the Express train is doubled, it takes 7 hours less than Rajdhani. The speed of Rajdhani is

Δ DEF is right angled at E. If m ∠D = 30°. What is the length (in cm) of DE, if EF = 2√3 cm?

What is the angle between centripetal acceleration and tangential acceleration?

If the simple interest on Rs. 400 for 10 years is Rs. 280, then rate of interest per annum is

20% discount is offered on an item. By applying a promo code the customer wins 15% cash back. What is the effective discount?