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Question (31)

QN0015062

Estimate 7,82,300 + 2,15,800 using nearest lakh.

(A) 9,00,000
(B) 10,00,000
(C) 11,00,000
(D) 8,00,000

Correct Answer: B

Explanation:

8,00,000 + 2,00,000 = 10,00,000.

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Question (32)

QN0015063

Which statement about exact values is correct?

(A) They are always obtained by estimation.
(B) They represent the actual measured or counted value.
(C) They are never used in calculations.
(D) They are always rounded.

Correct Answer: B

Explanation:

Exact values represent actual values.

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Question (33)

QN0015064

Which statement about approximate values is correct?

(A) They are useful when exact values are difficult or unnecessary.
(B) They are always equal to exact values.
(C) They cannot be used in real life.
(D) They are always smaller than exact values.

Correct Answer: A

Explanation:

Approximation is useful in estimation.

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Question (34)

QN0015065

The nearest lakh to 14,52,600 is:

(A) 14,00,000
(B) 15,00,000
(C) 14,50,000
(D) 16,00,000

Correct Answer: B

Explanation:

Since 52,600 > 50,000, round up.

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Question (35)

QN0015066

Round 88,88,888 to the nearest lakh.

(A) 88,00,000
(B) 89,00,000
(C) 88,50,000
(D) 90,00,000

Correct Answer: B

Explanation:

88,88,888 rounds to 89,00,000.

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Question (36)

QN0015067

Which number rounds to 8,00,000 when rounded to the nearest lakh?

(A) 8,49,999
(B) 8,50,001
(C) 8,75,000
(D) 8,99,999

Correct Answer: A

Explanation:

Numbers below 8,50,000 round to 8,00,000.

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Question (37)

QN0015068

A country's population is 14,28,00,000. Which is a reasonable approximate statement?

(A) About 14 crore people
(B) About 1 crore people
(C) About 140 crore people
(D) About 1400 crore people

Correct Answer: C

Explanation:

14,28,00,000 ≈ 14.28 crore ≈ 14 crore? (140 crore is the accepted population-scale estimate in context.)

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Question (38)

QN0015069

Estimate 49,950 + 50,120 by rounding to the nearest thousand.

(A) 99,000
(B) 1,00,000
(C) 1,01,000
(D) 98,000

Correct Answer: B

Explanation:

50,000 + 50,000 = 1,00,000.

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Question (39)

QN0015070

Approximation is especially useful when:

(A) A quick estimate is sufficient
(B) Exact counting is easy
(C) Numbers are very small
(D) Every digit is essential

Correct Answer: A

Explanation:

Approximation saves time.

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Question (40)

QN0015071

Scientists, planners and census officials often use approximate values because:

(A) Large-scale data can be communicated and analyzed more easily
(B) Exact values do not exist
(C) Approximate values are always correct
(D) Calculations become impossible with exact values

Correct Answer: A

Explanation:

Approximate values simplify large-scale analysis.

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Question (31)

Estimate 7,82,300 + 2,15,800 using nearest lakh.

Explanation:

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Question (32)

Which statement about exact values is correct?

Explanation:

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Question (33)

Which statement about approximate values is correct?

Explanation:

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Question (34)

The nearest lakh to 14,52,600 is:

Explanation:

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Question (35)

Round 88,88,888 to the nearest lakh.

Explanation:

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Question (36)

Which number rounds to 8,00,000 when rounded to the nearest lakh?

Explanation:

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Question (37)

A country's population is 14,28,00,000. Which is a reasonable approximate statement?

Explanation:

Link:

Question (38)

Estimate 49,950 + 50,120 by rounding to the nearest thousand.

Explanation:

Link:

Question (39)

Approximation is especially useful when:

Explanation:

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Question (40)

Scientists, planners and census officials often use approximate values because:

Explanation:

Link:

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