exam Maths Puzzle Numerical Ability

How many 9 digit numbers can be made from the set 1-9. No repeat digits so that all even digits remain adjacent?

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exam Other Question
A mother is 4 times as old as her son and in twenty years will be twice as old as her daughter, who is five years older than her brother. How old is each? find the surface area of the cylinder in terms of 3.14 the radius is 9cm and the height is 20 cm