Quantitative Aptitude - Arithmetic Ability Questions

The first and last terms of an arithmetic progression are 25 and ­52. What is the sum of the series if it has 12 terms?

If Girish's salary is 4/9 times of Harishankar's and Shirish's salary is 5/6 times of Harishankar's, what is the ratio of Girish's salary to Shirish's.

If 7x ­- 5y = 13 and 2x -­ y = 5, then (x -­ y) is

Select the odd letters from the given alternatives.

Both A and B together can complete a work in 20 days and B alone can complete the same work in 36 days. In how many days will A alone complete the work?

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.

In the given figure, from the point P two tangents PA and PB are drawn to a circle with centre Oand radius 5 cm. From the point O, OC and OD are drawn parallel to PA and PB respectively. If the length of the chord ABis 5 cm, then what is the value (in deg) of COD?

What is the area (in sq cm) of a rectangle if its diagonal is 25 cm and one of its sides is 24 cm?