Quantitative Aptitude - Arithmetic Ability Questions

ΔABC is right angled at B. If m∠C = 60°, then find the value of (cotA - 1/2).

If 5x/2 - [7(6x - 3/2)]/4 = 5/8, then what is the value of x?

What is the value of (4a2 + 8b + 14c + 2)/2 ?

What is the value of cos2A/(1 + sinA)?

Marked price of an item is Rs 300. On purchase of 2 items discount is 24%, on purchase of 5 items discount is 38%. Rachna buys 7 items, what is the effective discount?

In a bag, the ratio of red balls to green balls is 4:9. If 7 more red balls are added to the bag, the ratio of red balls to green balls will become 5:6. How many green balls are there in the bag?

D and E are points on the sides AB and AC respectively of ΔABC such that DE is parallel to BC and AD:DB = 4:5, CD and BE intersect each other at F. Then the ratio of the areas of ΔDEF and ΔCBF

(secA - 1)/(secA + 1) is equal to?