Greater than, less than

What number is one less than 10?

• 8

• 11

• 9

• 10

What number is one less than 7

• 6

• 8

• 9

• 10

What number is one more than 4

• 1

• 3

• 5

• 2

What number is one more than 9

• 8

• 10

• 7

• 11

What number is one less than 1?

• 2

• 1

• 3

• 0