Others Maths Puzzle

How many three digit numbers are there which have at least one digit as 3 and are divisible by 3?

A. 100
B. 94
C. 90
D. 84

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Others Other Question

if x/y is a fraction and x/y+y/x=-1. Find X^3-Y^3 ? The number of zeroes after decimal and before first non-zero digit in the decimal representation of 5⁻²º is

A. 7
B. 8
C. 12
D. 13