Mastering Digit Reversal: Problem-Solving in Math

A two-digit number is such that if you reverse its digits, the new number is 27 less than the original number. If the sum of the digits is 9, what is the original number?

• 54

• 81

• 63

• 72

Tags

CCSS.8.EE.C.8C

The ages of two siblings differ by 6 years. If you reverse the digits of the older sibling's age, the result is 3 years less than the younger sibling's age. What are their ages?

• Younger sibling: 22, Older sibling: 28

• Younger sibling: 18, Older sibling: 24

• Younger sibling: 20, Older sibling: 26

• Younger sibling: 24, Older sibling: 30

A two-digit number has digits that are reversed to form a new number. The new number is 18 more than the original number. If the sum of the digits is 11, what is the original number?

• 37

• 54

• 82

• 46

Tags

CCSS.8.EE.C.8C

A two-digit number is 4 times the sum of its digits. If you reverse the digits, the new number is 36 less than the original number. What is the original number?

• 48

• 36

• 24

• 72

Tags

CCSS.8.EE.C.7B

The sum of a two-digit number and the number formed by reversing its digits is 99. If the tens digit is 3 more than the units digit, what is the original number?

• 63

• 72

• 54

• 36

Tags

CCSS.8.EE.C.8C

A two-digit number is 5 times the sum of its digits. When the digits are reversed, the new number is 27 less than the original number. What is the original number?

• 45

• 72

• 54

• 36

The difference between a two-digit number and the number formed by reversing its digits is 27. If the sum of the digits is 10, what is the original number?

• 73

• 64

• 52

• 81

Tags

CCSS.8.EE.C.8C

A two-digit number is such that reversing its digits gives a number that is 9 more than the original number. If the tens digit is twice the units digit, what is the original number?

• 12

• 21

• 42

• 30

Tags

CCSS.8.EE.C.7B

A two-digit number is 3 times the sum of its digits. When the digits are reversed, the new number is 12 less than the original number. What is the original number?

• 84

• 72

• 96

• 54

The sum of a two-digit number and the number formed by reversing its digits is 110. If the tens digit is 4 less than the units digit, what is the original number?

• 27

• 46

• 37

• 53