Decode below rebus
D
N
A
T
S , D

Spot 5 differences in two Christmas tree below:

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?