exam Maths Puzzle Numerical Ability

Got the rest stuck on these
=For positive integers M, GCF(M, 2M) =

a. M b. 2M c. 3M d. It is impossible to tell

=

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exam Other Question

Use a map scale of 2 inches:25 miles fo find the actual distance for each measurment.
1.) 3 in.=
2.) 1/2 in.=
3.) 5 in.=

4.Anne lives 30 miles from her cousin.On a map she measures 3 in.between their homes.What is the scale of the map? The total revenue from Indian casnos in the US has been increasing at approximately $2.2 billion per year. In 2002, Indian casinos reported a combined revenue of $12.7 billion. In which year will total revenue reach $28.1 billion?