exam Maths Puzzle Numerical Ability

a no. consist of two digit whose sum is 9. if 9 is subtacted from the no.the digit interchange their places.find the no.

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exam Other Question

A Bank loaned out $12,000, part of it at the rate of 8% per year and the rest at the the rate of 18% per year. If the interest recieved totaled $1000, how much was loaned at 8%? find the product of (2^a4)(-3ab).