Prime Numbers
Triangular Numbers
Square Numbers
Rectangular Numbers
100

What are the first 5 prime numbers ?

2,3,5,7 and 11

100

What is the 9th triangular number ?

45

100

What is the equation for the 6th square number ?

6 times 6 is 36

100

What are the first 3 rectangular numbers?

2,6 and 12

200

How many prime numbers are in the 40s ? What are they?

3

41, 43, 47

200

What are the 4th to 8th triangular numbers?

10, 15, 21, 28, 36

200

What is the 4th square number ?

16

200

What are the first 4 rectangular numbers ?

2,6,12 and 20

300

What is the smallest prime number that you can find that is a sum of 3 prime numbers .

7

2 + 2 + 3

300

What is the 6th triangular number subtracted by the 5th?

6

300

What simple method can you use to find a square number ?

Times the number by itself 

300

What is the 8th rectangular number ?

72

400

How many single digit prime numbers are there ?

4

2, 3, 5, and 7

400

Why are they called triangular numbers?

Because they can be expressed graphically with triangular arrangements.

400

What is the 4th through 9th square numbers ?

16 , 25 , 36 , 49 , 64 , 81

400

What are the first 5 equations for the first 5 rectangular numbers ?

1 times 2 , 2 times 3 , 3 times 4 , 4 times 5 , 5 times 6

500

True or False : All even numbers can be expressed as a sum of two prime numbers. Give one example.

True.

4 = 2 + 2

6 = 3 + 3 ...

500

`What position is 78 in?

12th

500

What is the 9th square number plus the 7th minus the 5th?

105

500

What are the first ten rectangular numbers ?

2 , 6 ,12, 20, 30, 42, 56, 72, 90,  and 110