Math Contest for Class

There are 24 students in a classroom. Can they pair up evenly without any students left out?

• Yes, they can pair up evenly.

• No, one student will be left out.

• No, two students will be left out.

• Yes, but three students will be left out.

Write the number 805 in expanded form and in word form.

• 800 + 5; Eight hundred five

• 800 + 50; Eight hundred fifty

• 80 + 5; Eighty-five

• 800 + 50 + 5; Eight hundred fifty-five

Start at 310 and count by tens until you reach 390. What numbers do you say?

• 310, 320, 330, 340, 350, 360, 370, 380, 390

• 310, 315, 320, 325, 330, 335, 340, 345, 350

• 310, 311, 312, 313, 314, 315, 316, 317, 318

• 310, 320, 340, 360, 380, 400

What is the value of the 7 in the number 478?

• 7

• 70

• 700

• 0.7

Which number is smaller: 672 or 627?

• 672

• 627

• Both are equal

• Cannot be determined

What is 509 + 10?

• 519

• 5090

• 510

• 500

What is 17 + 6?

• 23

• 26

• 21

• 24

Ella collected 42 stickers. She gave 15 to her friend. How many stickers does she have left?

• 27

• 57

• 15

• 30

Solve: 68 - 44 = ?

• 24

• 22

• 34

• 44

Solve: 32 + 45 + 21 = ?

• 98

• 108

• 88

• 78