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Q:

A sum of money lent at compound interest for 2 years at 20% per annum would fetch Rs.482 more, if the interest was payable half yearly than if it was payable annually . The sum is

A) 10000	B) 20000
C) 40000	D) 50000

Answer & Explanation Answer: B) 20000

Explanation:

Let sum=Rs.x

C.I. when compounded half yearly = $[x {(1 + \frac{10}{100})}^{4} - x] = \frac{4641}{10000}$

C.I. when compounded annually = $[x {(\frac{20}{100})}^{2} - x] = \frac{11}{25}$

$\frac{4641}{10000} x - \frac{11}{25} x = 482$

=> x=20000

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Filed Under: Compound Interest
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Q:

An element X forms an oxide $XO_{_{3}}$ , what ihe valency of X

A) 1	B) 2
C) 3	D) 6

Answer & Explanation Answer: D) 6

Explanation:

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Filed Under: Chemistry

Q:

Which one of the following elements is the poorest conductor of heat

A) sodium	B) lead
C) zinc	D) mercury

Answer & Explanation Answer: B) lead

Explanation:

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Filed Under: Chemistry

Q:

Which one of the following substances does not have a melting point

A) bromine	B) sodium chloride
C) mercury	D) glass

Answer & Explanation Answer: D) glass

Explanation:

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Filed Under: Chemistry

Q:

Which one of the following mixture is homogeneous

A) starch and sugar	B) methanol and water
C) graphite and charcoal	D) calcium carbonate and calcium bicarbonate

Answer & Explanation Answer: B) methanol and water

Explanation:

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Filed Under: Chemistry

Q:

Among the given nutrients, milk is a poor source of

A) Calcium	B) Protein
C) Vitamin C	D) Carbohydrates

Answer & Explanation Answer: C) Vitamin C

Explanation:

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Filed Under: Chemistry

Q:

Jackie deposits $325 in an account that pays 4.1% interest compounded annually. How much money will Jackie have in her account after 3 years?

A) 346.64	B) 356.64
C) 366.64	D) 376.64

Answer & Explanation Answer: C) 366.64

Explanation:

A=P(1+r)^t

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Filed Under: Compound Interest
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Q:

Simon deposits $400 in an account that pays 3% interest compounded annually. What is the balance of Simon’s account at the end of 2 years?

A) 424.36	B) 524.56
C) 545.36	D) 456.36

Answer & Explanation Answer: A) 424.36

Explanation:

I=Prt

I=12

Balance = P +Prt

412

Find the balance at the end of the second year.

I = Prt=12.36

Balance =P + Prt

424.36

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Filed Under: Compound Interest
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