529
you could multiply: 1x490=490 2x245=490 or 10x49=490 you could add: 29+10=39 and so on
93
1 x 39, 3 x 13.
13+13+13=39
399
Defective numbers are when all the factors of a number add up to be smaller than the number.Ex.:39 1+3+13=17 17<39 39 is defective
93
39
1, 3, 13, 39.
78
To average two numbers you add them and divide by two; for three numbers you add and divide by three; and so on. For example, the average of 5, 10, and 24 would be 39/3 or 13.
13 and 3
3 and 13.
39 and 22
1 x 39, 3 x 13
1 x 39, 3 x 13
3x13 39x1
1 x 39, 3 x 13.