There are 25 boys in horizontal row. Rahul was shifted by three places towards his right side and he occupies the middle position in the row. What was his original position from the left end of the row?

Total number of boys = (10 + 27 - 1)
    = 37 - 1 = 36
So, Rajan's position from the right
= (36 - 10) + 1 = 26 + 1 = 27

In the given series, there are six 9's followed by and preceded by number divisible by 2.

According to question,
Days by Mohan, [17th, 18th or 19th] January
Days by sister, [19th, 20th, 21st or 22nd] January.
Required days is 19th January as it is common in both the groups.

According to above question,
Days by Rajat, June 18 or earlier.
Days by his sister, June 18 or June 19.
Clearly, June 18 is the required day.

Days by Pratap - [20,21 or 22] in April
Days by his sister, not on or after 22 April
Clearly, the answer is [20 or 21] in April.

Ascending order 1 2 3 4 5 7 8 9
? Required difference = 5 - 3 = 2

After interchanging the first and the last digit, numbers are 984, 145, 456, 359, 387
Hence, second highest number = 456 means 654.

Arranging all the digits in ascending order, we get
489, 145, 456, 359, 378
Hence , lowest number = 145 ? 541

489 ? 484, 541 ? 536, 654 ? 649,
953 ? 948, 783 ? 778
Hence, required difference = 7 - 4
= 3

After interchanging first first and second digit, number are
849, 451, 564, 593, 873.
Hence, third highest number = 593 ? 953