Question

thod 3. By Division
se 1. When the given numbers are perfect squares
ample 14 Find the square root of
(a) 7225 (b) 9409 how to find out
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Answer 1

Answer:

a)85, b)97

Step-by-step explanation:

There is a simple trick

You have to remember 1st 10squre number.

a)7225 (split the number into two parts)

=72,25(1st we will calculate the last 2digit.if there is 5at the end the last digit must be 5)

then find the neerest square number of 72. 8*8=64

then arrange the number

=8(which comes from 72)5(which come from 25)=85

b)9409(same as 1st one)

=94,09

now we have 09

we know last digit of 7and 3s square are 9.the last digit will be 7 or 3. we will find it leter.

now 1st 2digit 94 is near to the square of 9. (remember always take small no than the actual one)

9is the 1st digit.

now multiple 9with next no 10

9*10=90

(now remember here we got 90 which is smaller than 94. so we take 3as last digit. if the multiplying result is greater then actual then take greater no as last digit)

I hope it will be helpful to you. Read and solve it is very easy.

Answer 2

Answer:

a)85 b)97 is the right answer I hope it help

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