exam Maths Puzzle Numerical Ability

Determine x for 10^2x + 1 = 1000^x - 1
a. x = -2
b. x = 4
c. x = 9
d. No solution

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exam Other Question

Let loga3(b^5) = p and loga3(b^10) = x.
express x in terms of p.
solve the inequality

9r+15<24+10r