exam Maths Puzzle Numerical Ability

How many numbers each less than 400 can be formed from the digits 1,2,3,4,5,6, if repetition is allowed?

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exam Other Question

The length of a rectangle is 6 cm less than three times its width. If the area is 24 cm squared, find the length and width.

and

The length of a rectangle is 16 cm less than f At exactly what time (to the fraction of a minute) between 7:00 and 8:00 do the hands of a clock form a straight angle?