Brain teaser

For any set A,(A')' is equal to

• A'

• A

• Empty set

• None

The symmetric difference of A=(1,2,3) and

B=(3,4,5}

• {1,2}

• {1,2,5}

• {1,2,4,5}

• {3}

Tags

CCSS.HSS.CP.A.1

If 20% people travel by car,50% travels by bus,and 10% travels by both car and bus.Then people travel by car or bus is?

• 80%

• 60%

• 40%

• 70%

Tags

CCSS.HSS.CP.B.7

How many elements are there in power set of null set?

• 0

• 1

• 2

• Many

The sum of angles of hexagon is

• 180

• 360

• 540

• 720

3 Sin 90°

• 0

• 1

• 3

• Undefined

Tags

CCSS.HSF.TF.A.2

In obtuse angled triangle the formula for

side length is c²____a²+b²

• c²>

• c²<

• c²=

• Not enough information

Tags

CCSS.8.G.B.8

If 0<x<1, then which of following is true

• X½>X

• X½<X

• X²=X

• None

If f(x)= x2-2x+1 ,then f(4)=

• 9

• 10

• 12

• 14

Tags

CCSS.HSF.IF.A.2

15° = how many radians

• 1/12pi

• 859pi

• 14 pi

• 20 pi

Tags

CCSS.HSF.TF.A.1