Quantitative Aptitude - Arithmetic Ability Questions

The average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. The correct average of the observations is

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

Sum of two numbers is thrice their difference. Their ratio is

The costs of daily ticket of local train is Rs. 50 and Monthly Pass costs is Rs. 1125. If I buy the Monthly Pass and travel for 30 days in a month then I save?

What is the value of Sin 60° + (1/2)Cosec 45°?

If 2x-12x = 5, then what is the value x2 + 116x2 - 2

A man is 3 years older than his wife and four times as old as his son. If the son becomes 15 years old after 3 years. Then what is the present age of the wife?

The perimeter and the length of one of the diagonals of a rhombus is 34 cm and 8 cm respectively. Find the length of its other diagonal (in cm).