CISCE Board - ICSE Class 9

ICSE Class 9 Mathematics Core question bank (Mathematics)

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Q1.

Banking (Recurring Deposit): What is the interest formula for an RD account in 'Pure Arithmetic: Rational and Irrational Numbers, Surds'?

(A)

$I = P \times \frac{n(n+1)}{2 \times 12} \times \frac{r}{100}$ (Pure Arithmetic: Rational and Irrational Numbers, Surds)

(B)

$I = P \cdot n \cdot r$

(C)

$I = \frac{{P \cdot r}}{{100}}$

(D)

None of these

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Q2.

Trigonometric Identities: In 'Pure Arithmetic: Rational and Irrational Numbers, Surds', which fundamental identity is universally valid?

(A)

$\sin^2 \theta + \cos^2 \theta = 1$ and $1 + \tan^2 \theta = \sec^2 \theta$ (Pure Arithmetic: Rational and Irrational Numbers, Surds)

(B)

$\sin^2 \theta - \cos^2 \theta = 1$

(C)

$\tan^2 \theta - 1 = \sec^2 \theta$

(D)

None of these

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