ICSE ICSE Class 8 - CISCE Question Bank Solutions for Mathematics

Find the square root of 7 correct to two decimal places; then use it to find the value of `sqrt((4+sqrt(7))/(4-sqrt(7)` correct to three significant digits.

Find the value of `sqrt5` correct to 2 decimal places; then use it to find the square root of `(3-sqrt(5))/(3+sqrt(5)` correct to 2 significant digits.

Find the square root of: `(1764)/(2809)`

Find the square root of: `sqrt(108 xx 2028)`

Find the square root of: `0.01 + sqrt(0.0064)`

Find the square root of 7.832 correct to: 2 decimal places

Find the least number which must be subtracted from 1205 so that the resulting number is a perfect square.

Find the least number which must be subtracted from 2037 so that the resulting number is a perfect square.

Find the least number which must be added to 5483 so that the resulting number is a perfect square.

Seeing the value of the digit at unit’s place, state which of the following can be square of a number :
(i) 3051
(ii) 2332
(iii) 5684
(iv) 6908
(v) 50699

Squares of which of the following numbers will have 1 (one) at their unit’s place :
(i) 57
(ii) 81
(iii) 139
(iv) 73
(v) 64

Which of the following numbers will not have 1 (one) at their unit’s place :
(i) 322
(ii) 572
(iii) 692
(iv) 3212
(v) 2652

Square of which of the following numbers will not have 6 at their unit’s place :
(i) 35
(ii) 23
(iii) 64
(iv) 76
(v) 98

Which of the following numbers will have 6 at their unit’s place :
(i) 262
(ii) 492
(iii) 342
(iv) 432
(v) 2442

Find if the following number is a perfect cube?
243

Find if the following number is a perfect cube? 
588

Find if the following number is a perfect cube?
1331

Find if the following number is a perfect cube?
24000

Find if the following number is a perfect cube?
1728

Find if the following number is a perfect cube.

1938