Riddles for Math Centers

I am a three-digit number. My hundreds digit is 4, my tens digit is half of my ones digit, and my ones digit is 6. What number am I?

What number becomes larger when you turn it upside down?

I'm an odd number. Take one letter away and I become even. What am I?

I'm the shape with only one curved edge and no corners. What am I?

I'm a fraction equal to 3/4 with a denominator of 12. What am I?

If you skip-count by 8s starting at 16, what is the fourth number you say?

I have four sides. Two sides are longer than the others, and all angles are right angles. What shape am I?

I'm a sequence that doubles: 1, 2, 4, 8... What is the seventh term?

I am the perimeter of a square with side length 7 units. What am I?

I'm the time on the clock when the minute hand is on 6 and the hour hand is between 2 and 3. What time am I?

What weighs more: a kilogram of feathers or a kilogram of bricks?

If a baker bakes 36 cookies and packs them 9 per bag, how many bags does she fill?

I'm the product of 12 and 6, but also the sum of 70 and 2. What number am I?

I'm a prime number greater than 30 but less than 35. What am I?

I am half of 50 plus 10. What number am I?

If you add me to 15, you get 40. What number am I?

I am the number of sides on a hexagon. What am I?

I am 100 minus 37. What number am I?

I am the place value of the 5 in the number 253. What am I?

If two's company and three's a crowd, what are four and five?

I have three sides and three angles. What shape am I?

I have six faces, all squares. What shape am I?

I am a coin worth 25 cents. What am I?

A pizza is cut into 8 slices. You eat 3. How many are left?

I am the answer to 7 times 8. What number am I?

I am a quarter of 100. What number am I?

I am the number of minutes in half an hour. What am I?

I am a shape with five sides. What am I?

If you have 10 apples and give away 4, how many do you have left?

I am the sum of the angles in a triangle. What am I?