Quantitative Aptitude - Arithmetic Ability Questions

What is the value of (cot45 - √2) ?

Find length of the arc whose central angle is 90° and radius of the circle is 3.5 cm?

The average revenues of 7 consecutive years of a company is Rs 79 lakhs. If the average of first 4 years is Rs 74 lakhs and that of last 4 years is Rs 86 lakhs, what is the revenue for the 4th year?

A 600 metres long train is running at the speed of 81 km/hr. If it crosses a platform in 40 seconds, then what is the length of the platform (in metres)?

A natural number, when divided by 5,6,7 or 8,leaves a remainder of 4 in each case. what is the smallest of all such numbers?

Find the missing digit if it has 11 and 13 as factors?

Which of the following numbers is divisible by 12?

The point R(a,b) is first reflected in origin to R1 and R1 is reflected in x­axis to (­-4,2). The co-­ordinates of point R are