Section 1: This section will focus on addition.(Easy-Medium-Hard-Demon)

Are you ready?

• Yes

• No

• 1,004,928,249,827,545

• 1,002,928,239,887,540

• 1,004,328,349,822,544

• 1,034,948,249,827,541

Answer explanation

The last integer of the numbers in the equation are 7 and 3, so the last integer of the answer must be 0 (10)

• 3

• 5
• 3
• 9

Answer explanation

Same as the previous question...

What is the sum of the first 10 prime numbers?

(Hard)

• 27

• 122

• 129

• 58

Answer explanation

Prime numbers are numbers that cannot be divided except for 1. The first prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29. Plus them all, 129.

Evaluate the sum every prime number in: 1, 2, 3, 4, ...98, 99, 100

(Demon)

• 920
• 1060
• 1250

• 550

Answer explanation

I'm afraid that this question cannot be solved with any tricks. You must calculate it fair and square. (So, I gave you 10 minutes to solve this ( :)

Section 2: This section will focus on subtraction. (Easy-Medium-Hard-Demon)

Are you ready?

• Yes

• No

• 123456789
• 987654322

• 836550291
• 765432109

Answer explanation

Same as before, but this time it's subtraction (6-5=1)

• χ = 100
• χ = 400
• χ = 600
• χ = 800

• -1002

• -1502

• 4747

• 4040

Answer explanation

Sorry maybe this was too hard...

1-288-818-1818=1228-111-x

x=4040

Though it shouldn't take more than 3 minutes...

Explain: How to express 1000-2000=-1000?

(Demon)