exam Maths Puzzle Numerical Ability

How many 6 digit numbers can be made with any combination and permutation of 3 and 7? (e.g. 377777, 737777, 777333, 733733, 333337)

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exam Other Question

In a small rectangular wallet photo, the widith is 7 cm less than the length. If the border (perimeter) of the photo is 34cm, find the length and width (3x^3+5x^2+(9/2)x+(15/2))/2x^2+3