It’s embarrassing not to get all the points of this mathematical challenge. You just have to remember your school days to be victorious in this test.

### It’s embarrassing not to get all the points of this mathematical challenge, are you ready?

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## Select the prime number:

- 12
- 17
- 21

## Look closely at the symbols. | + 41 | + | – 9 | =?

- 32
- 52

## Perform the following operation. 12/12 – 7/12 =?

- 1/3
- 1/6

## Twice a number minus fifteen equals seven, what is the number?

- -4
- 6
- 11

## Which of these numbers is bigger?

- 2/7
- π / 4
- √3

## Eliminate the signs and solve. – 1 + [5 – (1 + 3 + 4) – 5] + 6 =?

- -3
- 4
- 12

## The mathematical constant e or Euler’s number is approximately equal to:

- 1,60669
- 2,71828

## Solve the following operation. 1/3 x 2/5 =?

- 6/5
- 2/15

## Rational numbers are denoted by:

- N
- Q
- R

## In a container there is 3/4 gallon of paint, if 1/2 gallon is used for painting, how much paint is left?

- 1/5
- 1/4
- 1/8

## Eliminate the signs and solve. 23 – [(- 7) + 5 – (-13)] + 51 =?

- 55
- 63
- 74

## In geometry, the perimeter is the measure of the contour of a figure.

- True
- False

## If three equal pieces of 17/3 m are cut from a 25 m tube, how many meters of the tube are left?

- 8 meters
- 11 meters

## Ana is three years younger than Felix. If twice as old as Felix is today in seven years will be Ana’s age, how old are they today?

- Felix is 4 years old and Ana 1 year old.
- Felix is 7 years old and Ana 4 years old.

## An icosahedron is a 1000-sided polyhedron.

- True
- False