Knowing Our Numbers (Exercise 1.10) RD Sharma Solutions | Mathematics (Maths) Class 6 PDF Download

Q1: Write the roman-numerals for each of the following:
(i) 33
(ii) 48
(iii) 76
(iv) 95
Ans:
(i) The roman-numeral of 33 is XXXIII.
(ii) The roman-numeral of 48 is XLVIII.
(iii) The roman-numeral of 76 is LXXVI.
(iv) The roman-numeral of 95 is XCV.

Q2: Write the following in Roman numerals:
(i) 154
(ii) 173
(iii) 248
(iv) 319
Ans:
(i) The roman-numeral of 154 is CLIV.
(ii) The roman-numeral of 173 is CLXXIII.
(iii) The roman-numeral of 248 is CCXLVIII.
(iv) The roman-numeral of 319 is CCCXIX.

Q3: Write the following in Roman numerals:
(i) 1008
(ii) 2718
(iii) 3906
(iv) 3794
Ans:
(i) The roman-numeral of 1008 is MVIII.
(ii) The roman-numeral of 2718 is MMDCCXVIII.
(iii) The roman-numeral of 3906 is MMMCMVI.
(iv) The roman-numeral of 3794 is MMMDCCXCIV.

Q4: Write the following in Roman numerals:
(i) 4201
(ii) 10009
(iii) 44000
(iv) 25819
Ans:

(i) The roman-numeral of 4201 is MVCCI.
(ii) The roman-numeral of 10009 is XIX.
(iii) The roman-numeral of 44000 is
.
(iv) The roman-numeral of 25819 is
DCCCXIX.

Q5: Write the following in Hindu-Arabic numerals:
(i) XXVI
(ii) XXIX
(iii) LXXII
(iv) XCI
Ans:
(i) The Hindu-Arabic numerals of XXVI is 26.
(ii) The Hindu-Arabic numerals of XXIX is 29.
(iii) The Hindu-Arabic numerals of LXXII is 72.
(iv) The Hindu-Arabic numerals of XCI is 91.

Q6: Write the corresponding Hindu-Arabic numerals for each of the following:
(i) CIX
(ii) CLXXII
(iii) CCLIV
(iv) CCCXXIX
Ans:
(i) The Hindu-Arabic numerals of CIX is 109.
(ii) The Hindu-Arabic numerals of CLXXII is 172.
(iii) The Hindu-Arabic numerals of CCLIV is 254.
(iv) The Hindu-Arabic numerals of CCCXXIX is 329.

Q7: Write the corresponding Hindu-Arabic numerals for each of the following:
(i) KXIX
(ii) KDLXV
(iii) KKCXXIII
(iv) KKKDCXL
Ans:
(i) The Hindu-Arabic numerals of KXIX is 1019.
(ii) The Hindu-Arabic numerals of KDLXV is 1565.
(iii) The Hindu-Arabic numerals of KKCXXIII is 2123.
(iv) The Hindu-Arabic numerals of KKKDCXL is 3640.

Q8: Write the following in Hindu-Arabic numerals:

Ans:
(i) The Hindu-Arabic numerals of
is 4444.

(ii) The Hindu-Arabic numerals of
is 6949.
(iii) The Hindu-Arabic numerals of
is 9391.
(iv) The Hindu-Arabic numerals of
is 70009.

Q9: Which of the following are meaningless?
(i) CC
(ii) KKKCCXI
(iii) XD
(iv) VC
Ans: In the given question we know that (i), (iii) and (iv) are meaningless.