Chapter 6 Square and Square Roots || Full Exercise 6.1 & Basic || Class 8 Maths RBSE CBSE NCERT

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EXERCISE 6.1
1. What will be the unit digit of the squares of the following numbers?
(i) 81 (ii) 272 (iii) 799 (iv) 3853
(v) 1234 (vi) 26387 (vii) 52698 (viii) 99880
(ix) 12796 (x) 55555
2. The following numbers are obviously not perfect squares. Give reason.
(i) 1057 (ii) 23453 (iii) 7928 (iv) 222222
(v) 64000 (vi) 89722 (vii) 222000 (viii) 505050
3. The squares of which of the following would be odd numbers?
(i) 431 (ii) 2826 (iii) 7779 (iv) 82004
4. Observe the following pattern and find the missing digits.
11^2 = 121
101^2 = 10201
1001^2 = 1002001
100001^2 = 1 ......... 2 ......... 1
10000001^2 = ...........................
5. Observe the following pattern and supply the missing numbers.
11^2 = 1 2 1
101^2 = 1 0 2 0 1
10101^2 = 102030201
1010101^2 = .......................................
................^ 2 = 10203040504030201
6. Using the given pattern, find the missing numbers.
1^2 + 2^2 + 2^2 = 3^2
2^2 + 3^2 + 6^2 = 7^2
3^2 + 4^2 + 12^2 = 13^2
42 + 52 + _ ^2 =21^2
7. Without adding, find the sum.
(i) 1 + 3 + 5 + 7 + 9
(ii) 1 + 3 + 5 + 7 + 9 + I1 + 13 + 15 + 17 +19
(iii) 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23
8. (i) Express 49 as the sum of 7 odd numbers.
(ii) Express 121 as the sum of 11 odd numbers.
9. How many numbers lie between squares of the following numbers?
(i) 12 and 13 (ii) 25 and 26 (iii) 99 and 100
एक्सक्लूसिव 6.1
1. निम्नलिखित संख्याओं के वर्ग का इकाई अंक क्या होगा?
(i) 81 (ii) 272 (iii) 799 (iv) 3853
(v) 1234 (vi) 26387 (vii) 52698 (viii) 99880
(ix) 12796 (x) 55555
2. निम्नलिखित संख्या स्पष्ट रूप से सही वर्ग नहीं हैं। कारण बताईये।
(i) 1057 (ii) 23453 (iii) 7928 (iv) 222222
(v) 64000 (vi) 89722 (vii) 222000 (viii) 505050
3. निम्नलिखित में से कौन सा वर्ग विषम संख्या में होगा?
(i) 431 (ii) 2826 (iii) 7779 (iv) 82004
4. निम्नलिखित पैटर्न का निरीक्षण करें और लापता अंकों को ढूंढें।
11 ^ 2 = 121
101 ^ 2 = 10201
1001 ^ 2 = 1002001
100001 ^ 2 = 1 ......... 2 ......... 1
10000001 ^ 2 = ..........................।
5. निम्नलिखित पैटर्न का निरीक्षण करें और लापता संख्या की आपूर्ति करें।
11 ^ 2 = 1 2 1
101 ^ 2 = 1 0 2 0 1
10101 ^ 2 = 102030201
1010101 ^ 2 = ......................................।
................ ^ 2 = 10203040504030201
6. दिए गए पैटर्न का उपयोग करके, लापता संख्याओं का पता लगाएं।
1 ^ 2 + 2 ^ 2 + 2 ^ 2 = 3 ^ 2
2 ^ 2 + 3 ^ 2 + 6 ^ 2 = 7 ^ 2
3 ^ 2 + 4 ^ 2 + 12 ^ 2 = 13 ^ 2
42 + 52 + _ ^ 2 = 21 ^ 2
7. जोड़ने के बिना, राशि खोजें।
(i) 1 + 3 + 5 + 7 + 9
(ii) 1 + 3 + 5 + 7 + 9 + I1 + 13 + 15 + 17 +19
(iii) १ + ३ + ५ + 9 + ९ + ११ + १३ + १५ + १ + + १ ९ + २१ + २३
8. (i) 7 विषम संख्याओं के योग के रूप में 49 को व्यक्त करें।
(ii) १११ को ११ विषम संख्याओं के योग के रूप में व्यक्त करें।
9. निम्नलिखित संख्याओं के वर्गों के बीच कितने अंक हैं?
(i) 12 और 13 (ii) 25 और 26 (iii) 99 और 100
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