Quantitative Aptitude - Arithmetic Ability Questions

The average age of a class of 39 students is 15 years. If the age of the teacher is included, then the average increases by 3 months. Find the age of the teacher.

Select the odd word/letters/number/number pair from the given alternatives.

Select the odd word from the given alternatives.

What is the slope of the line, perpendicular to the line 3x - 6y = 4?

If x = (√5) + 1 and y = (√5) – 1, then what is the value of (x2/y2) + (y2/x2) + 4[(x/y) + (y/x)] + 6?

Δ DEF is right angled at E. If m∠D = 45°, then what is the value of cosecF X cotD?

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

What is 0.53 + 0.53equal to ?