exam Maths Puzzle Numerical Ability

i have to show whether the following numbers are divisible by 2,3,or 5...The work needs to be shown. the numbers are 925, 165,351, and 1,495

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exam Other Question

How many three digit numbers can be formed using the digits 1,2,3,4,5,6 and 7 if no digit can be replaced in a number? I have a slight Idea on how to do this but I get stuck every The average speed for the first 36 miles was 12mph. The average speed for the next 45 miles was 15mph. What should be the average speed for the next 54 miles so that the overall average speed would be 15mph?