Prime and Composite NUMBERS
Is this number prime or composite? Why?
18
Composite.
It can be multiplied by more numbers than just one.
What are the factors of this numbers?
16
1x16=16
2x8=16
4x4=16
composite
354 × 5
1,770
12 × 23
276
The elephant in the zoo is 2 times as tall as the hippopotamus. The hippopotamus is 5 feet tall. How tall is the elephant?
10 ft
Is this number prime or composite? Why?
13
Prime.
It can only be multiplied by 1 and itself
What are the factors of this numbers?
35
1x35=35
5x7=35
7x5=35
2,356 × 4
9,424
86 × 97
8,342
This month Alexis saved 4 times more money than she did last month. Alexis saved $25 last month. How much did Alexis save this month?
100 dollars
Is this number prime or composite? Why?
24
Composite.
You can multiply different numbers to get 24.
Find the composite numbers that would make this equation true!
____x____=36
6x6
9x4
6 × 3,057
18,342
85 × 40
3,400
A pine tree is 54 feet tall. The pine tree is 9 times as tall as Jeff. How tall is Jeff?
54 is 9 x 6
Is this number prime or composite? Why?
29
Prime.
It can only be multiplied by 1 and itself
Find the composite numbers that would make this equation true.
___x___=72
9x8
8 × 8,274
66,192
70 × 53
3,710
Ricardo and Joe had lunch at Sunshine Cafe. Hamburgers cost $3 each, and tacos cost $2 each. Ricardo had 1 hamburger and 2 tacos. Joe had 3 tacos. How much did their lunch cost altogether?
$13
Is this number Prime or Composite? 2
Composite.
It can be multiplied by more numbers than just one.
What are the factors of this numbers?
42
1x42= 42
6x7=42
3,145 × 5 =
15,725
48 × 73
3,504
There are 12 bicycles and 15 tricycles at the toy store. How many wheels are there in all at the toy store?
69 wheels