Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd number group from the given alternatives.

Find the odd word/number/letters from the given alternatives

What is the value of √2 Sec 45° + (1/√3)Tan 30°?

If 1/√(1 -­ sin2A) = x, then the value of x is

All sides are congruent in a _____.

In an exam, the avarage marks obtained by John in English, Maths, Hindi and Drawing were 50. His average marks in Maths, Science, Social Studies and Craft were 70. If the average marks in all seven subjects is 58, his score in maths was

A car covers the first 30 km at a speed of 60 kmph and the next 20 km at 80 kmph. Find the average speed.

A mixture of 50 kg of cement and gravel contains 10% of gravel. How many kg of gravel must be added to make the gravel content 28% in the new mixture?