Question

1. The unit digit of square of 1543

2. Which is not a perfect square?

▪️23453

▪️6400

▪️3225

3. Find the number of numbers lie between squares of 13 and 20.

4. Express 49 as the sum of 7 odd numbers.

5. Find the smallest square number that is divisible by each of 4,9,10

6. Find the square root of 5929 by prime factorisation method.

7. Find the least number to be subtracted from 3250 to get a perfect square.

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Answer 1

Answer:

1. The unit digit is 9.

2. 23453 is not a perfect square.

3. 231 numbers lie between 13² and 20².

4. 49 = 1 + 3 + 5 + 7 + 9 + 11 + 13

5. Sorry not able to do this question. :(

6. The attachment is the answer.

7. 1 should be subtracted from 3250 as 3249 is a square of 57.

I hope I was of some help to you. :)

Answer 2

1. THE UNIT DIGIT DIGIT SQUARE IS 9
2. 3225 IS NOT A PERFECT SQUARE
3. 196 225 256 289 324 361 ARE THE NUMBER WHICH LIES BETWEEN SQUARE OF 13 AND 20
4. 7+7+7+7+7+7+7=49
5. 900 ARE THE SQUARE NUMBER WHICH IS DIVISIBLE BY 4,9,10
6. √5929=7×7×11×11=7×11=77

7.IF WE SUBTRACT 1 FROM 3250 THEN THE PERFECT SQUARE IS 57

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