Dr. Lal And Jain Solutions for Exercise 10: Reasoning

Which one of the numbers given in the answer choices below will replace the question-mark in the series given below?
$68021 69023 71027 ? 83051$

Which one of the following will be the last digit of the fourth number from the left after the following numbers have been arranged in ascending order after reversing the positions of the digit of each number?

$296 457 826 918 168$

Standing at a point, I travel on a circular path and cover 3.5 revolutions at a stretch. If I stop at point Q after completing my journey, what is the position of point Q on the circle?

If the word $\mathrm{DOGFIGHT}$ has been coded as $\mathrm{ODFGGITH}$, then how will you code $\mathrm{NORFOLKS}$ in the same code language?

Which one of the following is the letter next in the alphabetic order to the letter that is the eighteenth element from the left of the series?

Which one of the following is the third element to the right of the sixteenth element from the right of the series?

What is the difference between the highest and lowest numbers of this series?

What is the sum of the sum of the digits of all the three-digit numbers of this series?