Multiplication
3x5
15
16 / 4
4
18 and 20
2
20
First 6 digits of pi
3.14159
6x9
54
81 / 9
9
14 and 7
7
3 and 27
27
the only even prime number
2
6x7
42
64 / 4
16
12 and 32
4
28 and 8
56
number of pips (dots) on a 6-sided dice
21
7x8
56
650 / 5
130
27 and 18
9
12 and 30
60
Meters in 1 kilometer
1000
11x11
96 / 3
32
23 and 17
1
5 and 14
70
Speed of Light (miles per second)
186,000 miles per second