Solution:

100

Solution:

0488

Explanation
A) Its a 4 digit number. --- 0488

B) Its first digit is of no use --- 0 at the start is of no use.

C) Its third and fourth digit is the mirror image of each other. --- 8 is the only digit which is a mirror image of itself.

D) The second digit is half the third. --- 4 is half of the digit 8.

Solution:

3

Explanation:
The logic used to decipher the equation : Sum the numbers and then subtract the two digits to get the desired answer.

09 + 11+ 13 => 33 => 3 - 3 => 0
12 + 14 + 17 =>43 => 4 - 3 => 1
22 + 25 + 28 =>74 => 7 - 5 => 2
31 + 32 + 33 => 96 => 9 - 6 => 3

Solution:

2

Solution:

7 years.

Explanation:
Kylian * Thorgan * Eden = 175
and only value that fits in above equation is:
Kylian = Thorgan = 5years
Eden = 7 years

Solution:

20 more bullets

Explanation:
Initially, Willian has 'W' bullets and Pedro has 'P' bullets.

Based on statements, we have 2 equations
3P = W
2(P+10) = W-10

=> 2P + 20 = 3P - 10
=> 30 = P

P = 30 and W = 90.

Willian gave 10 bullets, therefore, need to give 20 more bullets so that they can 60 bullets each.

Solution:

28745

Explanation

New Number = (Last Number +1 ) * 9
and Then New Number = (Last Number - 1 ) * 8 and so on.

i.e
1
(1+1) * 9 = 18
(18-1) * 8 = 136
(136+1) * 7 = 959
(959-1) * 6 = 5748
(5748+1) * 5 = 28745
(28745-1) * 4 = 114976
(114976+1) * 3 = 344931

Solution:

0(zero) off course.

Solution:

120 km

Solution:

450

Explanation:
II - IV + IX = 200
=> VII = 200

VI + I - V = 100
=> II =100

II - VI + VII = 150
=> III = 150

Therefore,
VII + II + III = 200 + 100 + 150 = 450