CISCE Board - Class 8

Commercial Math, Algebra & Geometry question bank (Mathematics)

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Q1.

Commercial Arithmetic: In 'Rational Numbers, Squares, Square Roots, Cubes and Cube Roots', what is the compound interest formula?

(A)

$A = P\left(1 + \frac{r}{100}\right)^n$ and $CI = A - P$ (Rational Numbers, Squares, Square Roots, Cubes and Cube Roots)

(B)

$CI = P \cdot r \cdot t$

(C)

$A = P + r$

(D)

None of these

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Q2.

Exponents & Powers: What is the simplified expression for 'Rational Numbers, Squares, Square Roots, Cubes and Cube Roots' using exponential laws?

(A)

Simplified expression $a^{m-n}$ or $a^{mn}$ or $(ab)^n$ (Rational Numbers, Squares, Square Roots, Cubes and Cube Roots)

(B)

$a^m + a^n$

(C)

Zero

(D)

None of these

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