What should come in place of the question mark '?' in the following number series?

46, ?, 284, 345, 378, 391

In the following diagram, three different products (in thousands) produced by a company in 5 years are given and after studying them carefully, answer the following questions.

Three products produced by a company in different years (in thousands)

What is the average number of pan-drives produced by the company in all the years?

The sum of the squares of two natural consecutive odd numbers is 394. The sum of the numbers is –

PK is the median and M is a centroid of triangle PQR. If PK is 15 cm, then find length of PM?

On a certain Principal if the Simple interest for two years is Rs 4800 and Compound interest for the two years is Rs 5088, what is the rate of Interest?

What would be the simple interest obtained on an amount of `6,535 at the rate of 10 % p.a. (percent per annum) after 6 years?

Which of the following numbers is not a prime number?

By selling 100 pencils, A shopkeeper gains the selling price of 20 pencils. His gain percentage is