Quantitative Aptitude - Arithmetic Ability Questions

The sum of 10 terms of the arithmetic series is 390. If the third term of the series is 19. Find the first term

What least number must be added to 4131, so that the sum is completely divisible by 19?

The lengths of the two diagonals of a rhombus are 8 cm and 15 cm respectively. Find its area (in cm²).

Select the odd number from the given alternatives.

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

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

In the following question, select the odd word from the given alternatives.

If sec θ (cos θ + sin θ) = √2, then what is the value of (2 sin θ)/(cos θ – sin θ)?