Quantitative Aptitude - Arithmetic Ability Questions

The mean score in a test of the 10 boys in a class was 15 while the overall mean of the 25 students in the class was 16.2. What was the mean score of the girls?

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

If secθ = cosecq with 0° < θ , q < 90°, then the value of sin (θ + q) is

If 1/√(cosec2A - 1) = x, then value of x is

Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?

The areas of two similar triangles ΔXYZ and ΔPQR are 100 sq cms and 25 sq cms respectively. If PQ = 4 cm then what is the length of XY (in cm)?

A rectangular playground ground of length 125 m and width 75 m, has a walking strip of width 3 m in the middle of the ground, along the longer side. What is the area of the ground without the walking strip?

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.