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:

0(zero) off course.

Solution:

18 * 12 / 6 + 4

Solution:

    35997
+ 284508
========
    320505
========

Solution:

15/4 hours

Explanation:
Let us say they drive for "t" hours and initial fuel is "f"
Amount of fuel consumed by Fernando car is ft/4
Amount of fuel consumed by Sebastian car is ft/5

As per given condition,
f - ft/5 = 4(f-ft/4)
t = 15/4 hours

Solution:

168
12 14
6 2 7
3 2 1 7

Explanation:
If we multiply two numbers below, we will get the number above it.
like. 3*2 of the last row =>6 of the third row.

Solution:

Since Dean is at the 15th position from both ends, it means that there are 14 people before him and 14 people after him.

14 + 14 = 28
Counting him as well in the row, the total no. of people = 28 + 1 = 29.

Solution:

In the first deal, Sam made a profit of $250.
In the second deal, Sam made a profit of $250 again.

Therefore, he earned a total profit of $500.

Solution:

The remaining time is 15 minutes.

Since, 1/5 part of the time you have spent is left, the total time is 6 parts.

The total time is 90 minutes. 1/6 of 90 = 15.

Therefore, 15 minutes are remaining.