Quantitative Aptitude - Arithmetic Ability Questions

What is the simplified value of (cos4 A – sin4 A)?

What should be the missing digit so that the number 275_476 becomes exactly divisible by 11?

Given that the polynomial (x2+ ax+ b)leaves that same remainder when by (x –1) or (x + 1) What are the values of a and b respectively?

A watch shows 6 p.m. where the hour hand points east. In which direction is the minute hand facing when the time is 9.15 p.m?

What least number must be subtracted from 518, so that the sum is completely divisible by 13?

If the perimeter of a semicircle is 108 cm, then find its area (in cm²).

Find the odd numbers/letters/numbers from the given alternatives.

Select the odd letters from the given alternatives.