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.
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1. Find the least number that should be subtracted from 2750 to get a perfect square. Also find the square root of the
Verified answer
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
hey which school bro...