In 8, three times.
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2 x 2 x 2 x 2 x 2 = 32
2 times 2 times 2 times x times y equals 8xy
The exponent tells how many times the base is used as a factor. 23 = 2 x 2 x 2
1,024 because all the numbers between 1 and 1000 that have 2 as their only prime factor are 2,4,8,16,32,64,128,265,512 The patern is that 2 times 2 =4, 4 times 2=8, 8 times 2=16 ect. and 512 times 2 = 1,024
2 times 5 times 7 times x times y