How fast does your heart beat? How long does it take for your heart to beat 1,000 times? If you started counting your heartbeats at midnight on Jan 1, 2000, when would you count the millionth beat? What about the billionth?

Problems

Grades: 3rd to 5th

Num & Ops Base Ten

Generalize place value understanding for multi-digit whole numbers.

Use place value understanding and properties of operations to perform multi-digit arithmetic.

3.NBT.A.1, 4.NBT.A.3

How Long do you think you would have to wait in this line if you hold the number 300?

Problems

Going Around in Circles
If we pick any two distinct points on a circle, and connectthem with a chord, the chord will divide the interior of the circle into twodistinct, nonintersecting regions. If we pick three distinct points on a circleand connect each pair of them with a chord, we can form four distinct,no

Problems

Factor Craze
Here's a Problem to Ponder that will help your students ease back into the groove at the start of the school year. Students usually know that prime numbers have exactly two factors -1 and the number itself. But, which numbers have exactly three factors? Exactly four factors? Exactly five factors?

Problems

It's All About Zero
How many zeroes occur at the end of the expanded numeral for 1000!?
How about in general, for
n
!?
Some Ponderings:
Recall that December's Problem to Ponder was as follows:
How many zeroes occur at the end of the expanded numeral for 1000!?

Problems