After 12 noon in military time the next hour is 13 and so on until midnight. 15:57 in regular time would be 3:57 pm.
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3.8
The GCF is 3.
57 cannot go into 15 at all because 57 is a larger number than 15. In division, the divisor (57 in this case) must be smaller than the dividend (15) for the division to be possible. Since 57 is greater than 15, it cannot divide evenly into 15, and the result would be a fraction or decimal.
It is: 17+25+15 = 57 and 57/3 = 19 which is the average
She is currently 15. The way to work it out is... divide 57 by 3 (giving 19), then subtract 4.