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.

The price of an article is cut by 33%, to restore to its original value, the new price must he increased by

Slope of the side DA of the rectangle ABCD is 5/3. What is the slope of the side AB?

∆XYZ is right angled at Y. If tanX = 24/7, then what is the value of cotZ ?

Three categories of employees get wages in the ratio of 1 : 2 : 3. If they get increments of 5%, 10% and 15% respectively, what will be the new ratio of their wages?

If a person walks at 12 km/hr instead of 10 km/hr, he would have walked 1 km more in the same time. What is the actual distance (in kms) travelled by him at 10 km/hr in the same time?

In the following question, select the odd word pair from the given alternatives.

If A = 400 and B = 600, then A is how much percentage less than B?