Grade 8 CBSE math Squares, Square roots,Patterns – test 1

Directions: Type the answer in the space provided

1. What is the sum of the largest 5 digit perfect square number and the smallest 4 digit perfect square number?

2. What is the units digit of the result of  191²+165²-278²+637² ?

3. What is the smallest number that must be added to 7658 to make it a perfect square?

4. What is the smallest numbers to be subtracted from 8932 to make it a perfect square?

5. If
9² = 81
99² = 9801
999²= 998001
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.
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999999² =

6.
If
1² = 1
11² = 121
111² = 12321
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11111111²=

7.
If
2178 x 4 =8712
21978 x 4 = 87912
219978 x 4 = 879912
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21999999978 x 4 =

8.
If
4²=16
34²=1156
334²=111556
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33333334²=

9.
If
1+9 =10
11+99= 110
111+999= 1110
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111111+999999=

10.
If
69²+260² = 269²
609²+20600²=20609²
6009²+2006000²=2006009²
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600009²+20000600000²= ²