CHAPTER 8 – EXTREME JEOPARDY

Pattern Detectives

100

420, 430, 440, ___, ___
What are the next two numbers AND the rule?

450, 460 — increases by 10

200

601, 611, 621, ___
What is the missing number?

631

300

270, 280, ___, 300
What number is missing?

290

400

124, 224, 324, ___
What is the missing number?

424

500

98, 108, 118, ___, ___
What are the next two numbers AND what changed?

128, 138 — added 10 each time

Tricky More & Less

100

What is 10 more than the number that is 10 less than 452?

452

200

I am thinking of a number.
10 less than my number is 390.
What is my number?
 

400

300

100 more than a number is 735.
What is the number?

635

400

I start with 468.
I add 100, then subtract 10.
What number do I end with?

558

500

The number is 100 less than 700 and 10 more than another number.
What is the other number?

590

Symbol Traps

100

523 ___ 532

<

200

640 ___ 600 + 40

=

300

708 ___ 780

<

400

499 ___ 500 − 1

=

500

Which is greater:
609 or 590 + 20?

590 + 20 = 610 → 610 > 609  

Number Line Mastery

100

Which number is closer to 500: 498 or 502?

Both (equal distance)

200

Name a number that is between 615 and 620 AND ends in 8.

618

300

What number is halfway between 740 and 760?

750

400

I am greater than 432 and less than 438.
I am an even number.

What number could I be?  

434 or 436

500

True or False:
The number 499 is closer to 500 than 480.

True

Dig Deeper (Explain Your Thinking)

100

Is 635 closer to 600 or 700?

600

200

A student says:
“625 > 631 because 5 > 1.”
Is the student correct? Why or why not?

No — compare tens before ones

300

Three numbers are: 482, 428, 824 

Which is greatest? Explain.

824

400

You have 490 points.
Newton has 100 fewer.
Descartes has 10 more than Newton.
Who has more points — you or Descartes?

You (490 vs. 400)

500

Create two different 3-digit numbers that are

• less than 700

• greater than 680

• end in the same digit

Example: 682 and 692