Quantitative Aptitude - Arithmetic Ability Questions

A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is : 

What is 90 days from today?

Hints : Today is 20th January 2017, Sunday

$$\begin{gathered} (4x - 7)2 = ? \\ \end{gathered}$$

The length and breadth of a rectangle are 15 cm and 8 cm respectively. Calculate its perimeter (in cm).

∆UVW is right angled at V. If cosU = 8/17, then what is the value of sinW ?

The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :

Find the odd one out of the series ?

35, 48, 54, 63, 81, 105

Which of the following statement(s) is/are TRUE?

I. √(64) + √(0.0064) + √(0.81) + √(0.0081) = 9.07
II. √(0.010201) + √(98.01) + √(0.25) = 11.51