exam Maths Puzzle Numerical Ability

Four coins

Place four coins on a table with heads facing downward. On each move you must turn over exactly three coins. Count the number of moves it takes to get all four coins

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exam Other Question
The function, p(d)=1+d/33, gives the pressure, in atmospheres (atm), at a depth d in the sea (d is in feet). Note that p(0)=1 atm, p(33)=2, and so on. Find the pressure at 150 ft.

The pressure at 150 feet is ____ atm. If the angle of rotation with respect to lines l and m measures 30°, then l and m intersect to form an angle of

these are the choices:
1) 90°
2) 60°
3) 30°
4) 15°