60 Prime factorization of 10,15 and 20 \(\begin{array}{c|c}2&10,15,20\\\hline2&5,15,10\\\hline3&5,15,5\\\hline5&5,5,5\\\hline&1,1,1,\end{array}\) LCM of 10, 15 and 20 = 22 × 3 × 5 = 60
07. KNOWING OUR NUMBERS
290402
Numerals that can be repeated in Roman system are:
1 I, X and C
2 I, V and X
3 V, L and D
4 D
Explanation:
I, X and C As per the rules of writing Roman numbers, Only I, X, C, and M can be repeated; V, L, and D cannot be repeated. Hence, Numerals that can be repeated in Roman system are I, X and C
07. KNOWING OUR NUMBERS
290403
XC is same as __________.
1 100 - 10
2 100 + 10
3 100 - 50
4 100 - 9
Explanation:
100 - 10 We know that X = 10, C = 100 Therefore, XC = 100 - 10
07. KNOWING OUR NUMBERS
290404
Mark the correct alternative in the following: The difference between the largest three digit number and the largest three digit number with distinct digits is:
1 10
2 0
3 12
4 13
Explanation:
12 The largest three-digit number = 999 The largest three-digit number with distinct digits = 987 \(\therefore\) Difference = 999 - 987 = 12
60 Prime factorization of 10,15 and 20 \(\begin{array}{c|c}2&10,15,20\\\hline2&5,15,10\\\hline3&5,15,5\\\hline5&5,5,5\\\hline&1,1,1,\end{array}\) LCM of 10, 15 and 20 = 22 × 3 × 5 = 60
07. KNOWING OUR NUMBERS
290402
Numerals that can be repeated in Roman system are:
1 I, X and C
2 I, V and X
3 V, L and D
4 D
Explanation:
I, X and C As per the rules of writing Roman numbers, Only I, X, C, and M can be repeated; V, L, and D cannot be repeated. Hence, Numerals that can be repeated in Roman system are I, X and C
07. KNOWING OUR NUMBERS
290403
XC is same as __________.
1 100 - 10
2 100 + 10
3 100 - 50
4 100 - 9
Explanation:
100 - 10 We know that X = 10, C = 100 Therefore, XC = 100 - 10
07. KNOWING OUR NUMBERS
290404
Mark the correct alternative in the following: The difference between the largest three digit number and the largest three digit number with distinct digits is:
1 10
2 0
3 12
4 13
Explanation:
12 The largest three-digit number = 999 The largest three-digit number with distinct digits = 987 \(\therefore\) Difference = 999 - 987 = 12
60 Prime factorization of 10,15 and 20 \(\begin{array}{c|c}2&10,15,20\\\hline2&5,15,10\\\hline3&5,15,5\\\hline5&5,5,5\\\hline&1,1,1,\end{array}\) LCM of 10, 15 and 20 = 22 × 3 × 5 = 60
07. KNOWING OUR NUMBERS
290402
Numerals that can be repeated in Roman system are:
1 I, X and C
2 I, V and X
3 V, L and D
4 D
Explanation:
I, X and C As per the rules of writing Roman numbers, Only I, X, C, and M can be repeated; V, L, and D cannot be repeated. Hence, Numerals that can be repeated in Roman system are I, X and C
07. KNOWING OUR NUMBERS
290403
XC is same as __________.
1 100 - 10
2 100 + 10
3 100 - 50
4 100 - 9
Explanation:
100 - 10 We know that X = 10, C = 100 Therefore, XC = 100 - 10
07. KNOWING OUR NUMBERS
290404
Mark the correct alternative in the following: The difference between the largest three digit number and the largest three digit number with distinct digits is:
1 10
2 0
3 12
4 13
Explanation:
12 The largest three-digit number = 999 The largest three-digit number with distinct digits = 987 \(\therefore\) Difference = 999 - 987 = 12
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07. KNOWING OUR NUMBERS
290401
LCM of 10, 15 and 20 is:
1 30
2 60
3 90
4 180
Explanation:
60 Prime factorization of 10,15 and 20 \(\begin{array}{c|c}2&10,15,20\\\hline2&5,15,10\\\hline3&5,15,5\\\hline5&5,5,5\\\hline&1,1,1,\end{array}\) LCM of 10, 15 and 20 = 22 × 3 × 5 = 60
07. KNOWING OUR NUMBERS
290402
Numerals that can be repeated in Roman system are:
1 I, X and C
2 I, V and X
3 V, L and D
4 D
Explanation:
I, X and C As per the rules of writing Roman numbers, Only I, X, C, and M can be repeated; V, L, and D cannot be repeated. Hence, Numerals that can be repeated in Roman system are I, X and C
07. KNOWING OUR NUMBERS
290403
XC is same as __________.
1 100 - 10
2 100 + 10
3 100 - 50
4 100 - 9
Explanation:
100 - 10 We know that X = 10, C = 100 Therefore, XC = 100 - 10
07. KNOWING OUR NUMBERS
290404
Mark the correct alternative in the following: The difference between the largest three digit number and the largest three digit number with distinct digits is:
1 10
2 0
3 12
4 13
Explanation:
12 The largest three-digit number = 999 The largest three-digit number with distinct digits = 987 \(\therefore\) Difference = 999 - 987 = 12
