200 = 23*52
72 *23
23 x 53 = 1000
23 x 53 = 1000
24*27 = (23*3) * 33 = 23*34
It is: 23*3*52 = 600
360= 23 times 45
Think of the "ex" in index as meaning exponent. Write the prime factorization with exponents. 216 = 23 x 33
23 x 112 = 968
2.3 x 10^2
23 x 33 = 216
"index" is the singular form - "indices" is the plural :)