Book Maths Puzzle Numerical Ability

find the harmonic mean of two numbers whose geometric mean and arithmetic mean is 8 and 5 repectively

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Book Other Question

the last digit of A is same as the last digit of its square how many such numbers exist from 0 to 90 the mean of 20 observation found is 65 but later it was found that 69 was misread as 96 find the correct mean