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Question (11)

QN0029323

Which statement correctly explains the need for a placeholder symbol?

(A) It increases the value of digits.
(B) It removes ambiguity in place value notation.
(C) It replaces numerals greater than 9.
(D) It helps in Roman numerals.

Correct Answer: B

Explanation:

A placeholder such as zero shows that no value exists at a particular place.

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Question (12)

QN0029324

The Roman numeral MMCMXLIV represents:

(A) 2934
(B) 2944
(C) 2954
(D) 2964

Correct Answer: B

Explanation:

MM = 2000, CM = 900, XL = 40 and IV = 4. Hence, the number is 2944.

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Question (13)

QN0029325

Which of the following is an advantage of choosing landmark numbers as powers of a base?

(A) It eliminates counting.
(B) It simplifies arithmetic operations.
(C) It removes the need for numerals.
(D) It avoids grouping.

Correct Answer: B

Explanation:

Landmark numbers that are powers of a base make arithmetic operations easier.

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Question (14)

QN0029326

Which pair correctly matches the civilization with its number system?

(A) Roman – Base 10
(B) Egyptian – Base 60
(C) Mesopotamian – Base 60
(D) Mayan – Base 5

Correct Answer: C

Explanation:

The Mesopotamian (Babylonian) number system used base 60.

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Question (15)

QN0029327

Which additional feature makes the Hindu number system more efficient than earlier systems?

(A) Use of tally marks
(B) Use of place value with zero
(C) Unlimited symbols
(D) Counting only by tens

Correct Answer: B

Explanation:

The Hindu number system combines place value with the digit zero for efficient representation and computation.

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Question (16)

QN0029328

Which of the following Roman numerals represents the greatest number?

(A) MCCXCIX
(B) MCCCIX
(C) MCCCLX
(D) MCCLXXXVIII

Correct Answer: C

Explanation:

Their values are 1299, 1309, 1360 and 1288 respectively. Hence, MCCCLX is the greatest.

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Question (17)

QN0029329

Which idea finally removed the need to invent infinitely many new symbols for larger numbers?

(A) Counting by twos
(B) Roman numerals
(C) Place value notation
(D) Tally marks

Correct Answer: C

Explanation:

Place value notation allows infinitely many numbers to be represented using a fixed set of symbols.

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Question (18)

QN0029330

The present-day system of measuring time (60 minutes in an hour) is based on the influence of which ancient civilization?

(A) Egyptian
(B) Roman
(C) Mesopotamian
(D) Chinese

Correct Answer: C

Explanation:

The Mesopotamian base-60 system influenced modern units of time.

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Question (19)

QN0029331

If XLIX is increased by LI, the resulting Roman numeral is:

(A) XCIX
(B) C
(C) CI
(D) CV

Correct Answer: B

Explanation:

XLIX = 49 and LI = 51. Their sum is 100, represented by C.

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Question (20)

QN0029332

Which sequence correctly shows the evolution of number representation?

(A) Place value → Landmark numbers → Tally marks → Base systems
(B) Tally marks → Landmark numbers → Base systems → Place value with zero
(C) Roman numerals → Hindu numerals → Tally marks → Zero
(D) Chinese numerals → Roman numerals → Egyptian numerals → Tally marks

Correct Answer: B

Explanation:

Number representation evolved from tally marks to landmark numbers, then base systems, and finally place value systems with zero.

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Question (11)

Which statement correctly explains the need for a placeholder symbol?

Explanation:

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Question (12)

The Roman numeral MMCMXLIV represents:

Explanation:

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Question (13)

Which of the following is an advantage of choosing landmark numbers as powers of a base?

Explanation:

Link:

Question (14)

Which pair correctly matches the civilization with its number system?

Explanation:

Link:

Question (15)

Which additional feature makes the Hindu number system more efficient than earlier systems?

Explanation:

Link:

Question (16)

Which of the following Roman numerals represents the greatest number?

Explanation:

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Question (17)

Which idea finally removed the need to invent infinitely many new symbols for larger numbers?

Explanation:

Link:

Question (18)

The present-day system of measuring time (60 minutes in an hour) is based on the influence of which ancient civilization?

Explanation:

Link:

Question (19)

If XLIX is increased by LI, the resulting Roman numeral is:

Explanation:

Link:

Question (20)

Which sequence correctly shows the evolution of number representation?

Explanation:

Link:

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