Solution:

U472BMT

Explanation:
The code can be decoded to sound as "U four seven two B M T"
U
four (4)
seven (7)
two (2)
B
M
T

Solution:

A

Explanation:
Pi = 3.141592653.....
All images are related by pi value i.e "The number of straight lines on each shape corresponds to the digits of pi."

Solution:

She is near the trunk of the tree as shown below.

Solution:

The ice just started to melt and since the sun rises from the east, Mr. Draxler is able to figure out where is north.

Solution:

Mahrez Pick 4 marbles.

Explanation:
How many marbles Vardy picks, Mahrez needs to make sure that only 1 marble is left after his move, So Vardy needs to pick the last marble.

Example:
If Vardy picks 1, Mahrez picks 5
If Vardy picks 2, Mahrez picks 4
....
...
If Vardy picks 5, Mahrez picks 1

Solution:

XI - I = X

Explanation:
Remove I (Roman equivalent of number 1) from the left side, you will the get the number on the right.
29 - 1 = 30
XXIX - I = XXX (Roman equivalent of number 30)

14 - 1 = 15
XIV - I = XV (Roman equivalent of number 15)

9 - 1 =10
IX - I = X (Roman equivalent of number 10)

Similarly,
11 - 1 = 10
XI - I = X (Roman equivalent of number 10)

Solution:

Costa

Explanation:
Costa brings the dagger made of ice in the thermos so it won't melt. He killed the Michy with the dagger and then the dagger melts with time.

Solution:

Terry was in the lift.

Solution:

abracadabra

Solution:

Step5 is Wrong.

Explanation:
We divided the two sides by (A-B).Since A = B which indicates that (A - B) = 0 and we cannot divide by zero.