Quantitative Aptitude - Arithmetic Ability Questions

If  x = 2+3,then what is the value of 2x + 12x ?

The sum of three numbers is 2, the 1st number is 1/2 times the 2nd number and the 3rd number is 1/4 times the 2nd number. The 2nd number is

If the average age of four children is 12 years and the average age of these children and their fathers is 20 years, what is the age of the father?

The line passing through (­3,4) and (0,3) is perpendicular to the line passing through (5,7) and (4,x). What is the value of x?

Three triangles are marked out of a bigger triangle at the three vertices such that each side of each of the smaller triangles is one-fourth as long as each corresponding side of the bigger triangle. The ratio of the area of the three small triangles taken together to that of the rest of the bigger triangle is

What is the simplified value of 0.072+0.292-0.02030.073+0.293

If a-1a=1, then a2 + 1a2 ?

The list price of an article is Rs. 900. It is available at two successive discounts of 20% and 10% . The selling price of the article is: