Solution:

zero

6 without head => 0
9 without tail => 0
8 in two halves => 0 & 0

Solution:

No one to blame

Solution:

Man1 is carrying 5 bags and the Man2 is carrying 7 bags.

Let's assume that the Man1 was carrying M1 bags and the Man2 was carrying M2 bags.
M2 + 1 = 2 * (X-1)
M2 + 1 = 2M1 - 2
M2 = 2M1 - 3

Also,
M2 - 1 = M1 + 1
M2 = M1 + 2

=>
2M1 - 3 = M1 + 2
M1 = 5

=>
M2 = 7

Solution:

C

VIII has taken place of VII.

Solution:

Fare and Square

Solution:

Circle Of Friends

Solution:

iron curtain(ir on curtain)

Solution:

1. 8P of the SS - 8 planets of the Solar System
2. 1M of the E - 1 Moon of the earth
3. 1S of the SS - 1 Sun of the Solar System
4. 60M in 1H - 60 minutes in 1 Hour

Solution:

Step1 -> Start running both the hourglasses.
Step2 -> When 4 hours hourglass runs out, turn it over.
Step3 -> When 7 hours hourglass runs out, turn it over.
Step4 -> Again when 4 hours hourglass runs out, turn 7 minute hourglass over (it was running for exactly one minute.)
final step -> 8 minute already passed and allow one minute of 7 hour glass to get over. ==>9 minute

Solution:

A Taxi Driver