Question

1. Find the least number that should be subtracted from 2750 to get a perfect square. Also find the square root of the perfect square so obtained. 2. Find the least number that must be added to 4074 to get a perfect square . Also find the square root of the perfect square so obtained. 3. In a right triangle ABC , angle B =90 .If PQ= 6cm , QR= 8cm ,find PR. 4. A gardener has 1100 plants . He wants to plant these in such a way that the number of rows and the number of columns remain the same. Find the minimum number of plants he needs more for this. 5. Estimate the square root of 300.

Answer 1

First we find

123456

by division method

9<12<16

3

2

<12<4

2

62×2=124

63×3=189

65×5=325

66×6=396

702×2=1404

hence (51)62<123456<(352)

2

we calculate (352)

2

−123456

=123904−123456

=448

hence least number to be added to get a

perfect square is 448.

since 123456+448=123904=(352)

2

Answer 2

hey which school bro...