290334
The number of distinct prime factors of the largest 4-digit number is:
1 2
2 3
3 5
4 11
Explanation:
3 We know that, largest 4-digit number = 9999 Prime factors of 9999 \(\begin{array}{c|c}3&9999\\ \hline3&3333\\ \hline11&1111\\ \hline101&101\\ \hline&1\end{array}\) i.e. 9999 = 3\(^{1}\) ×11 × 101 Hence, the number of distinct prime factors of the largest 4-digit number is 3.
07. KNOWING OUR NUMBERS
290335
Mark the correct alternative in the following: The difference between the greatest and smallest numbers which when rounded off a number to the nearest tens as 540, is:
1 10
2 9
3 8
4 10
Explanation:
9 544 is the greatest number that when rounded off to the nearest tens will become 540. 535 is the least number that when rounded off to the nearest tens will become 540. \(\therefore\) Difference: 544 - 535 = 9
07. KNOWING OUR NUMBERS
290336
Mark the correct alternative in the following: The smallest counting number is:
1 0
2 1
3 10
4 None of these.
Explanation:
1 The smallest digit is 0, but the smallest counting number is 1.
07. KNOWING OUR NUMBERS
290337
Mark \((\checkmark)\) against the correct answer: Which of the following is not meaningful?
1 CI
2 CII
3 IC
4 XC
Explanation:
IC I can be subtracted from V and X only. Thus, IC is wrong.
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07. KNOWING OUR NUMBERS
290334
The number of distinct prime factors of the largest 4-digit number is:
1 2
2 3
3 5
4 11
Explanation:
3 We know that, largest 4-digit number = 9999 Prime factors of 9999 \(\begin{array}{c|c}3&9999\\ \hline3&3333\\ \hline11&1111\\ \hline101&101\\ \hline&1\end{array}\) i.e. 9999 = 3\(^{1}\) ×11 × 101 Hence, the number of distinct prime factors of the largest 4-digit number is 3.
07. KNOWING OUR NUMBERS
290335
Mark the correct alternative in the following: The difference between the greatest and smallest numbers which when rounded off a number to the nearest tens as 540, is:
1 10
2 9
3 8
4 10
Explanation:
9 544 is the greatest number that when rounded off to the nearest tens will become 540. 535 is the least number that when rounded off to the nearest tens will become 540. \(\therefore\) Difference: 544 - 535 = 9
07. KNOWING OUR NUMBERS
290336
Mark the correct alternative in the following: The smallest counting number is:
1 0
2 1
3 10
4 None of these.
Explanation:
1 The smallest digit is 0, but the smallest counting number is 1.
07. KNOWING OUR NUMBERS
290337
Mark \((\checkmark)\) against the correct answer: Which of the following is not meaningful?
1 CI
2 CII
3 IC
4 XC
Explanation:
IC I can be subtracted from V and X only. Thus, IC is wrong.
290334
The number of distinct prime factors of the largest 4-digit number is:
1 2
2 3
3 5
4 11
Explanation:
3 We know that, largest 4-digit number = 9999 Prime factors of 9999 \(\begin{array}{c|c}3&9999\\ \hline3&3333\\ \hline11&1111\\ \hline101&101\\ \hline&1\end{array}\) i.e. 9999 = 3\(^{1}\) ×11 × 101 Hence, the number of distinct prime factors of the largest 4-digit number is 3.
07. KNOWING OUR NUMBERS
290335
Mark the correct alternative in the following: The difference between the greatest and smallest numbers which when rounded off a number to the nearest tens as 540, is:
1 10
2 9
3 8
4 10
Explanation:
9 544 is the greatest number that when rounded off to the nearest tens will become 540. 535 is the least number that when rounded off to the nearest tens will become 540. \(\therefore\) Difference: 544 - 535 = 9
07. KNOWING OUR NUMBERS
290336
Mark the correct alternative in the following: The smallest counting number is:
1 0
2 1
3 10
4 None of these.
Explanation:
1 The smallest digit is 0, but the smallest counting number is 1.
07. KNOWING OUR NUMBERS
290337
Mark \((\checkmark)\) against the correct answer: Which of the following is not meaningful?
1 CI
2 CII
3 IC
4 XC
Explanation:
IC I can be subtracted from V and X only. Thus, IC is wrong.
290334
The number of distinct prime factors of the largest 4-digit number is:
1 2
2 3
3 5
4 11
Explanation:
3 We know that, largest 4-digit number = 9999 Prime factors of 9999 \(\begin{array}{c|c}3&9999\\ \hline3&3333\\ \hline11&1111\\ \hline101&101\\ \hline&1\end{array}\) i.e. 9999 = 3\(^{1}\) ×11 × 101 Hence, the number of distinct prime factors of the largest 4-digit number is 3.
07. KNOWING OUR NUMBERS
290335
Mark the correct alternative in the following: The difference between the greatest and smallest numbers which when rounded off a number to the nearest tens as 540, is:
1 10
2 9
3 8
4 10
Explanation:
9 544 is the greatest number that when rounded off to the nearest tens will become 540. 535 is the least number that when rounded off to the nearest tens will become 540. \(\therefore\) Difference: 544 - 535 = 9
07. KNOWING OUR NUMBERS
290336
Mark the correct alternative in the following: The smallest counting number is:
1 0
2 1
3 10
4 None of these.
Explanation:
1 The smallest digit is 0, but the smallest counting number is 1.
07. KNOWING OUR NUMBERS
290337
Mark \((\checkmark)\) against the correct answer: Which of the following is not meaningful?
1 CI
2 CII
3 IC
4 XC
Explanation:
IC I can be subtracted from V and X only. Thus, IC is wrong.