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The citizens of planet negate are 8 fingered and have thus developed their decimal system in base 8.
A certain street in negate contains 1000 (in base 8) buildings numbered 1 to 1000.
How many 3’s are used in numbering these buildings?

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TCS Other Question

find the number of rectangles in the adjoining figure(square is also a rectangle). the figure is a grid of 12x6 . There are 3 boys A, B, C and 2 Girls D, E. E always sit right to A. Girls never sit in extreme positions and in
the middle position. C always sits in the extreme positions. Who is sitting immediate right to E?