Solution:

When blind man "Grandpa" opened his bandages, the train must be passing through the dark tunnel. The man thought he was still blind and hence commit suicide.

Solution:

On phone, using pause button, the teller messaged to her mother "Emergency mother, call help".

Explanation:
all Except one in bold is paused by the teller.
Is there an emergency mother, Call me when you reach home and I will help you with the dinner.

Solution:

What is your color

Explanation:

== Step-1 : Write all the colors ==
White White Black White Blue
Silver Pink Blue Blue Blue
Orange Purple Purple Gray Blue
Orange Orange Yellow Black Yellow

== Step-2: select nth letter of, where n is the column number (Note: we will ignore blue ==
w h a t _
s i _ _ _
o u r y _
o r l c o

== Step-3 : Unscramble each row==
what
is
your
color

Solution:

Dice (6 sided)

Explanation:
> I am always 1 to 6: numbers on dice are from 1 to 6.

> I am always 15 to 20: Sum of all the visible sides (1 top and 4 on the sides) always add up to 15 to 20.

> I am always 5: Five sides are visible.

> I am 21 when I am flying: When we throw the dice, we can see all 6 sides for a small moment which all add up to 21.

Solution:

February(just 28 days)

Solution:

Oscaru and Austin.

Explanation:
The Chemist hide the name using periodic table as shown in below picture
76-20-44 => Os(76) + Ca(20) + Ru(44)
79-16-22-7=> Au(79) + S(16) + Ti(22) + N(7)

Solution:

thunderstorm (TH UNDER STORM)

Solution:

288/61 hours (4 hours, 43 minutes and 17 seconds approx)

Explanation:
In 1 hour, the ratio of swimming pool filled by pipes:
1st pipe: 1/48
2nd pipe: 1/72
3rd pipe: 1/96
4th pipe: 1/6

All togther
1/48 + 1/72 + 1/96 + 1/6
=> (6+4+3+48) / 288 = 61/288.
=> 288/61 hours,

which is 4 hours 43 minutes and about 17 seconds.

Solution:

94

Explanation:
every second number is reverse of the square of a number
2 -> 4
3 -> 9
4 -> 61 (Reverse of 16)
5 -> 52 (Reverse of 25)
6 -> 63 (Reverse of 36)
7 ->94 (Reverse of 49)

Solution:

Coming(Most Likely)

Explanation:
> As a common practice, you walk a horse from the left-hand side.
> Leg angles also suggest that they might be coming.
> Shadow direction also suggest that might be coming