for each of the following number find the smallest number by which it should be multiplied so as to get the perfect square also find the square root of the square number so obtained
1728
PLEASE
FIND
ANSWEEE
RRRRR
Answers
Answer:
a find you are smiling at your phon in a letter of a letter from a letter of the same name that
Answer:
Search for questions & chapters
Class 8
>>Maths
>>Squares and Square Roots
>>Square Roots
>>For each of the following n...
Question
Bookmark
For each of the following numbers find the smallest whole number by which it should be multiplied so as to get a perfect square number. Also find the square root of the square number so obtained .
(i) 252
(ii) 180
(iii) 1008
(iv) 2028
(v) 1458
(vi) 768
Medium
Solution
verified
(i) 252=2×2×3×3×7
Here, 2 and 3 are in pairs but 7 needs a pair. Thus, 7 can become a pair after multiplying 252 with 7.
So, 252 will become a perfect square when multiplied by 7.
Thus, Answer = 7
perfect square no.= 252x7=1764
square root of 1764=42
(ii) 180 = 3 x 3 x 2 x 2 x 5
Here, 3 and 2 are in pair but 5 needs a pair to make 180 a perfect square.
180 needs to be multiplied by 5 to become a perfect square.
Thus, Answer = 5
perfect square no.=180x5=900
square root of 900=30
(iii) 1008 = 2 x 2 x 2 x 2 x 3 x 3 x 7
Here, 2 and 3 are in pair, but 7 needs a pair to make 1008 a perfect square.
Thus, 1008 needs to be multiplied by 7 to become a perfect square
Hence, Answer = 7
perfect square no.=1008x7=7056
square root of 7056=84
(iv)2028 = 2 x 2 x 3 x 13 x 13
Here, 2 and 13 are in pair, but 3 needs a pair to make 2028 a perfect square.
Thus, 2028 needs to be multiplied by 3 to become a perfect square.
Hence, Answer = 3
perfect square no.=2028x3=6084
square root of 6084=78
(v)1458 = 2 x 3 x 3 x 3 x 3 x 3 x 3
Here, 3 are in pair, but 2 needs a pair to make 1458 a perfect square.
So, 1458 needs to be multiplied by 2 to become a perfect square.
Therefore, Answer = 2
perfect square no.=1458x2=2916
square root of 2916=54
(vi)768 = 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3
Here, 2 are in pair, but 3 needs a pair to make 768 a perfect square.
So, 768 needs to be multiplied by 3 to become a perfect square.
Hence, Answer = 3
perfect square no.= 768x3=2304
square root of 2304=48