Math

Number Riddles

100

I am an odd number. I am greater than (>) 15 and less than 18. What number am I?

17

200

When you multiply me by 7, you get 28. What number am I?

4

300

I am less than 10 but more than 2. When you multiply me by myself, you get another 1 digit number. What number am I?

3

400

If you add the digits of my number together, you get 13. I am greater than 60 but less than 70. What number am I?

67

500

I am a three digit number. When you subtract 1 from me I become a two digit number. What number am I?

100

30 secondAddition

100

88 + 9 = ?

97

200

77 + 66 = ?

143

300

982 + 49 = ?

1,031

400

276 + 122 = ?

398

500

245 + 327 = ?

572

Multidigit Multiplication

100

22 X 5 = ?

110

200

39 X 3 = ?

117

300

81 X 5 = ?

405

400

123 X 3 = ?

369

500

564 X 7 = ?

3,948