Test: Squares And Square Roots- 2 - Class 8 MCQ

Test: Squares And Square Roots- 2 - Class 8 MCQ

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20 Questions MCQ Test Mathematics (Maths) Class 8 - Test: Squares And Square Roots- 2

Test: Squares And Square Roots- 2 for Class 8 2024 is part of Mathematics (Maths) Class 8 preparation. The Test: Squares And Square Roots- 2 questions and answers have been prepared according to the Class 8 exam syllabus.The Test: Squares And Square Roots- 2 MCQs are made for Class 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Squares And Square Roots- 2 below.
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Test: Squares And Square Roots- 2 - Question 1

If 4x2 - 12x + k is a perfect square, then the value of k is-

Detailed Solution for Test: Squares And Square Roots- 2 - Question 1

Test: Squares And Square Roots- 2 - Question 2

Find the least number that must be subtracted from 5607 so as to get a perfect square.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 2

Square of 75 is 5625 square of 74 is 5476 so use must get 5476

5607 - x is 5476

x is 131

Square root of 5476 is 74

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Test: Squares And Square Roots- 2 - Question 3

What will be the number of zeros in the square of 60?

Detailed Solution for Test: Squares And Square Roots- 2 - Question 3

The square of 60 is 3600. Therefore, the number of zeroes is 2.

Test: Squares And Square Roots- 2 - Question 4

How many natural numbers lie between 92 and 102?

Detailed Solution for Test: Squares And Square Roots- 2 - Question 4

Between 92 and 102
Here, n = 9 and n + 1 = 10
∴ Natural number between 92 and 102 are (2 × n) or 2 x 9, i.e. 18.

Test: Squares And Square Roots- 2 - Question 5

Find the square of 39.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 5

(40-1)= 1600+1-80 = 1521

Test: Squares And Square Roots- 2 - Question 6

Without adding, find the sum. 1 + 3 + 5 + 7 + 9 + 11 + 13

Detailed Solution for Test: Squares And Square Roots- 2 - Question 6

Total consecutive odd numbers (n) = 7

We know that, Sum = n2

= 72

= 49

Hence, the correct answer is 49

Test: Squares And Square Roots- 2 - Question 7

Find the square root of 729.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 7

The square root of 729 is 27.

Test: Squares And Square Roots- 2 - Question 8

Sum of squares of two numbers is 145. If square root of one number is 3, find the other number.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 8

Test: Squares And Square Roots- 2 - Question 9

If a number has 1 or 9 in the unit’s place, then it’s square ends in ________.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 9

If a number has 1 or 9 in the unit’s place, then it’s square ends in 1

Test: Squares And Square Roots- 2 - Question 10

None of the square numbers end with _________ at unit’s place.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 10

According to the Property 1, A number having 2, 3, 7 or 8 at it's unit's place is never a perfect square. In other words, no square number ends in 2, 3, 7 or 8.

Test: Squares And Square Roots- 2 - Question 11

________ is the inverse operation of square.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 11

The inverse of squaring a number is square root.

Test: Squares And Square Roots- 2 - Question 12

Find the perfect square numbers between 50 and 60.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 12

Since we have 72=49 and 82=64.There is no perfect square between 50 and 60.

Test: Squares And Square Roots- 2 - Question 13

What is the least perfect square which is divisible by 2, 4 and 6?

Detailed Solution for Test: Squares And Square Roots- 2 - Question 13

LCM of 2,4,6= 2×1×2×3=12
Least perfect square which is a multiple of 12 is 36.

Test: Squares And Square Roots- 2 - Question 14

2025 plants are to be planted in a garden in such a way that each row contains as many plants as the number of rows. Find the number of plants in each row.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 14

Let the number of rows be x
Thus, the each row contains x plants.
The total number of plants in the garden = number of rows × number of plants in each rows
Thus,
2025=x×x
=>x=2025
=>x=  3×3×3×3×5×5
​       =3×3×5
=45
Thus, there are 45 rows and each row contains 45 plants.

Test: Squares And Square Roots- 2 - Question 15

Find the greatest 4-digit number which is a perfect square.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 15

By division method we find the root of 9999 and we get the remainder 198.So subtracting 198 from 9999 we get 9801 as the greatest 4-digit perfect square.

Test: Squares And Square Roots- 2 - Question 16

What will be the number of zeros in the square of 400?

Detailed Solution for Test: Squares And Square Roots- 2 - Question 16

Square of 400 = 160000

Hence, the number of zeroes is 4

Test: Squares And Square Roots- 2 - Question 17

What is the least number to be added to 4523 to make it a perfect square?

Detailed Solution for Test: Squares And Square Roots- 2 - Question 17

The square of the numbers are

(66)2 = 4356

(67)2 = 4489

(68)2 = 4624

So, the least number to be added = 4624 - 4523 = 101

Hence, the correct answer is "101".

Test: Squares And Square Roots- 2 - Question 18

The largest perfect square between 4 and 50 is

Detailed Solution for Test: Squares And Square Roots- 2 - Question 18

The square of 7 is the largest number between 4 to 50.
32 42 52 62 72 so clearly 72 = 49

Test: Squares And Square Roots- 2 - Question 19

Without adding, find the sum of 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19

Detailed Solution for Test: Squares And Square Roots- 2 - Question 19

Test: Squares And Square Roots- 2 - Question 20

Find the square root of 529.

Detailed Solution for Test: Squares And Square Roots- 2 - Question 20

Square root of 529 is 23

Mathematics (Maths) Class 8

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Mathematics (Maths) Class 8

79 videos|408 docs|31 tests