15 maths quiz questions that I bet you won’t answer. I hope you are ready for a real challenge, take your time to answer correctly.

### 15 maths quiz questions that I bet you won’t answer. Only 1 in 625 people can answer all 15

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- Question of
## What is the average of 1/2, 5/6, 3/4 and 5/12?

- 2/5
- 5/8
- 5/2

- Question of
## Find the value of z if the average of four values: 1; 0.8; 0.2 and z is 0.6.

- 0.2
- 0.4
- 0.66

- Question of
## Carmen buys 3 kg of rice at 89 $/kg. Marta buys 2 kg of carottes at 49 $/kg. What is the average cost in $/kg of the tasty mixture?

- 73
- 69
- 70

- Question of
## The average of two numbers is a. If the greater number is 1. Which is the smaller number?

- a-1
- 1-a
- 2a-1

- Question of
## A trench can be dug in 6 days by 15 workers. How many days will 45 workers need?

- 2
- 18
- 3

- Question of
## Three consecutive odd numbers add up to 939, with the lowest number being:

- 309
- 311
- 313

- Question of
## Walking 9 hours a day, a traveler travels in 10 days 360 km, how many km would he travel in 25 days, walking 8 hours a day?

- 800
- 600
- 500

- Question of
## What is the average of N, N-2, N+2 and 2N ?

- 2N
- N/4
- 5N/4

- Question of
## What is the average of 1024, 1057 and 1000?

- 1024
- 1027
- 1050

- Question of
## You have 6 black socks, 2 green socks and 4 blue socks. What is the probability of not getting any green socks in two attempts?

- 1/2
- 15/22

- Question of
## A die is rolled. What is the probability of a number less than 10?

- 2/3
- 100%
- 1

- Question of
## 20% of 20% of a number is 32. The number is:

- 700
- 800
- 900

- Question of
## 30% of 40% of 70% of 50 is:

- 4.2
- 42
- 6

- Question of
## If 12 workers take 30 days to complete a job, how many workers will be needed in 24 days?

- 10
- 15
- 20

- Question of
## If the price of the candy is reduced by 15% it would be 3400 $/kg. What is the original price?

- 4000
- 5000
- 5500