Quiz 1A - Combinatorics

Amy chooses 2 digits from 0, 2, 5, 7, 8 and 9 without repetition to form a 2-digit number. What is the largest odd number can Amy form?

• 99

• 98

• 97

• 87

Tags

CCSS.2.OA.C.3

Luffy chooses 2 digits from 1, 3, 4, 5 and 8 without repetition to form a 2-digit number. What is the largest even number can Luffy form?

• 88

• 85

• 84

• 38

Tags

CCSS.1.NBT.B.3

Tom chooses 2 digits from 3, 6, and 9 without repetition to form 2-digit numbers. How many numbers can Tom form?

• 3

• 4

• 5

• 6

Ben chooses 2 digits from 0, 1, 3, and 6 without repetition to form 2-digit numbers. How many even numbers are there among those formed?

• 3

• 4

• 5

• 6

How many 2-digit numbers can be formed using digits 1, 4 and 8? Digits can be repeated.

• 12

• 11

• 10

• 9

Given 5 digits 1, 2, 3, 4, and 5. Find the greatest sum of two 2-digit numbers formed by those digits without repetition.

• 86

• 97

• 95

• 93

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Given 5 digits 1, 2, 3, 4, and 5. Find the smallest sum of two 2-digit numbers formed by those digits without repetition.

• 28

• 35

• 37

• 46

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Which number below is the smallest even number?

• 20203924

• 20110019

• 20211014

• 20101030

Tags

CCSS.4.NBT.A.2

Justin has 8 $1 coins, 1 $2 coin and 2 $5 coins. How many ways can he buy a book that costs $8 without any change?

• 3

• 4

• 5

• 6

Diane shares the sweets with her two friends equally. How many sweets does each of them get?

• 9

• 6

• 7

• 5

Tags

CCSS.3.OA.A.3