Question

Q2. Find the square of 35 without actual calculation.​

Answer 1

Answer:

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Step-by-step explanation:

Ans is. 35*35 = 35*30+35*5

= 1050 + 175 = 1225

Answer 2

Answer:

This technique is only applicable to 2 digit numbers ending with 5.

Number = 35

Step-1:

The square of the no. 35 with have 4 digits, say = abcd

As the number is ending with 5, so the the last two digits (c&d) will be the square of 5 = 25

Therefore, c=2 and d=5

Step-2:

Now, Multiply the no. 3 with its successor, i.e 3+1=4

As, 3 * 4 = 12

So, a=1 and b=2

Step-3:

Finally write the digits in order, i.e abcd

abcd = 1225

Therefore, the square of 35 is 1225.

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