Question

be
: to
9. Find the missing digit in 2220_ so that the
number becomes a perfect square.
umber which must be​

Answer 1

Answer:

the missing number is 1

answer 22201

Answer 2

Answer:

The missing digit must be equal to 1 to make it a perfect square.

Step-by-step explanation:

We must make 2220_ a perfect square.

As far as the units digit is concerned numbers 0 - 9 can only be written in its place.

Now, let's find the closest square number closest to 2220_

The least number we can make will be 22200 and Greatest number would be 22209.

Now,

√22200 = 148.99

√22209 = 149.02

Now,

We see that,

The square number is between 22200 and 22209.

Also, from above we observe that,

√(Of the required number) = 149

Since,

Least number gives 148.99 and Greatest number gives 149.02.

Hence,

Our answer is simply the Square of 149

So,

149² = 22201

Thus,

The missing digit must be equal to 1 to make it a perfect square.

Hope it helped and believing you understood it........All the best