8th Grade

Writing Inequalities

100

A number r is more than 0 or less than or equal to -8.

r<-8

200

A number d minus 2 is less than –1

d-2<-1

300

The sum of a number y and 9 is at least -1  

y+9>-1

400

Ten is at least the product of a number h and 5

10>5h

500

A number z minus 6 is greater than or equal to 11

z-6>11

Solving Inequalities

100

2x+4>      24

X>10

200

-b-2>8

b<-10

300

-7x+7<-56

x>9

400

Solve the inequality. Graph the solution. 

-3<y-4

y>1

500

4<1+n/7

n>21

Solving Inequalities

100

Graph the inequality

y<-2

200

Write an inequality that represents the graph.

x> 8

300

Solve the inequality. Graph the solution.

9+q<15

q<6

400

The maximum volume V of an American white pelican’s bill is about 700 cubic inches. A pelican scoops up 100 cubic inches of water. Write and solve an inequality that represents the additional volumes V the pelican’s bill can contain.

v+100< 700

V<600

500

Solve the inequality. Graph the solution.

z-(-7)<5 

z<-2

Riddles

100

How far can a dog run into the woods?

Halfway

200

It likes food, but water kills it. What is it?

Fire

300

You’re driving a city bus. At the first stop, three women get on. At the second stop, one woman gets off and a man gets on. At the third stop, two children get on. The bus is blue and it’s raining outside in December. What colour is the bus driver’s hair?

Whatever Color your Hair is 

400

It’s as light as a feather, but the strongest person can’t hold it for more than five minutes. What is it?

Breath

500

A man was walking in the rain in the middle of nowhere without a coat or an umbrella. He got soaked, but not a single hair on his head was wet. How can this be?

He was Bald

Brain teasers

100

Divide 30 by ½ and add 10. What’s the answer

70

200

1. RBAE & HREAS

Bear and Share

300

1. ODULC & ODOG

Good and could

400

A clerk at the butcher shop is six feet tall and wears size 10 shoes. What does he weigh?

Meat

500

A farmer is travelling with a fox, a goose, and a bag of beans. During his journey, he comes across a river with a boat to cross it.

The farmer can only fit one thing in the boat with him at a time. If left alone together, the fox will eat the goose or the goose will eat the beans. How does the farmer get everything across the river safely?

1. he farmer brings the goose across the river first (if he leaves the goose alone, it will either eat the beans or be eaten by the fox).
2. The farmer brings either the fox or the beans across and leaves the other one alone.
3. Now the farmer has two items on the other side of the river, including the goose. If he leaves the goose again, the same problem will occur. So, the farmer must bring the goose back to the other side.
4. The farmer brings the other item back (either the fox or the beans) and leaves the goose alone again. The fox and the beans are now on the other side of the river.
5. The farmer returns and brings the goose across the river again.