Quantitative Aptitude - Arithmetic Ability Questions

What is the value of sin (B – C) cos (A – D) + sin (A – B) cos (C – D) + sin (C – A) cos (B – D)?

If the equation 4x + 3y + 5 = 0 and 6x - ky - 7 = 0 have no solution, then the value of k is

Find out the odd word/letters/number pair from the given alternatives

Of the 3 numbers whose average is 70, the first is 1/9 times the sum of other 2. The first number is

If 3a=4b=6c and a+b+c=279 then a2+b2+c2 is equal to

If the ratio of cost price and selling price be 10:11, then the profit percentage is

If sin π/6 + sec π/6 = x, then x is

Which one is the largest among the fractions (5/113), (7/120), (13/145) and (17/160)?