One important thing....7 out of those 10 are foreigners. Tells you Nigeria has a leadership/management problem.

The questions are tricky but actually simple to solve.

Q1. 100y+y=110
y=110/101=1.089...

Q2. 10 machines taking 10 minutes for 10 donuts means each machine makes one every 10 minutes. Therefore, 100 machines would make 100 in the same 10 minutes.

Q3.

Leaving aside the poor English in which the question is formulated, I assume it means the person is buying 12eggs for N5 and selling each one for N3 or for a total of N36

therefore cost of each egg = 5/12=N0.416667
price at which they are sold = N3
therefore, profit per egg = 3-0.416667 = 2.5833

Now, if he sells 20 eggs per day, his daily profit will be 20*2.5833=N51.666 per day

Hence, total profit per year can be 51.666*365=N18 858, which is less than a million.

The only way to perhaps become a millionaire is if the condition of 20 eggs/day has been wrongly written here. Then it would be possible if we consider the compounded growth in the person's ability to purchase and sell eggs.