Suppose that a, b > 0. If the equation x² + ax + b = 0

Select the correct mirror image of the given figure when the mirror is placed at MN as shown below.

Change the question mark with the option that follows the applied logic in the first pair.

E: P :: I: ??

Select the set in which the numbers are related in the same way as are the numbers of the following set.

Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.

Select the figure from the given options that will replace the question mark (?) in the figure given below to complete the pattern.

Select the figure from among the given options that can replace the question mark (?) in the following series.

In a certain code language, 'PQRS' is written as "HIJK'. How will 'XYZA' be written as in the same coding language?