In the given figure, PQR is an equilateral triangle and PS is the angle bisector of angle P. What is the value of RT : RQ?

Sai can do any work in 17 days. While Bindu can do it in 51 days. Sai works on the first day Bindu works on the second day and this sequence continues until the work is over. How many days will it take to complete the work?

An organism which can monitor air pollution is –  

Which of the following statements regarding soils of Rajasthan is/are correct? Select the correct answer using the codes given below -
i) In the Thar desert sandy soils have been formed from granitic and sandstone rocks
ii ) In the southern part red loamy soils have been formed from granite, gneiss and quartzite rocks
iii ) In the south - eastern part black soils have been formed from the erosion of basaltic lava
iv ) In the southern part mixed red soils have been formed from the erosion of phosphatic rocks
Codes – 

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'

Prabha was exorbitantly paid (a)/ for how skillful she received (b)/ the visitors and entertained (c)/ them. (d)/ No error (e)

The amount of ordinary salt present in ocean water is-