MCQ 11 Mark
Tick $(\checkmark)$ the correct answer of the following: $\sqrt{0.9}\times\sqrt{1.6}=\ ?$
- A
$0.12$
- B
$1.2$
- ✓
$0.75$
- D
$12$
AnswerCorrect option: C. $0.75$
$=\sqrt{0.9\times1.6}$
$=\sqrt{1.44}$
$=\sqrt{1.2\times1.2}$
$=1.2$
View full question & answer→MCQ 21 Mark
Tick $(\checkmark)$ the correct answer of the following:
Which of the following is a pythagorean triplet?
- A
$(2,3,5)$
- B
$(5,7,9)$
- C
$(6,9,11)$
- ✓
$(8,15,17)$
AnswerCorrect option: D. $(8,15,17)$
$(8)^2+(15)^2$
$=64+225$
$=289$
$=(17)^2$
View full question & answer→MCQ 31 Mark
Mark $(\checkmark)$ against the correct answer $\sqrt{2\frac{1}{4}}=\ ?$
- A
$2\frac{1}{2}$
- B
$1\frac{1}{4}$
- ✓
$1\frac{1}{2}$
- D
AnswerCorrect option: C. $1\frac{1}{2}$
$\sqrt{2\frac{1}{4}}$
$=\sqrt{\frac{9}{4}}$
$=\frac{\sqrt{9}}{\sqrt{4}}$
$=\frac{\sqrt{3\times3}}{\sqrt{2\times2}}$
$=\frac{3}{2}$
$=1\frac{1}{2}$
View full question & answer→MCQ 41 Mark
Tick $(\checkmark)$ the correct answer of the following: The square of a proper fraction is:
- A
Larger than the fraction.
- ✓
Smaller than the fraction.
- C
- D
AnswerCorrect option: B. Smaller than the fraction.
The square of a proper fraction is the smaller than the given fraction.
View full question & answer→MCQ 51 Mark
Tick $(\checkmark)$ the correct answer of the following: Which of the following numbers is not a perfect square?
Hint: The number $81000$ ends in an odd number of zeros.
- A
$3600$
- B
$6400$
- ✓
$81000$
- D
$2500$
AnswerCorrect option: C. $81000$
$81000$ as it has odd number of zeros at its end.
View full question & answer→MCQ 61 Mark
Tick $(\checkmark)$ the correct answer of the following: Which of the following cannot be the unit digit of a perfect square number?
Answer$8,$ as the number with $8$ in the end cannot be perfect square.
View full question & answer→MCQ 71 Mark
Tick $(\checkmark)$ the correct answer of the following: Which of the following is the square of an odd number?
- A
$2116$
- B
$3844$
- ✓
$1369$
- D
$2500$
AnswerCorrect option: C. $1369$
We know that the square of an odd number is also an odd number.
$\begin{array}{c|c}&37\\\hline3&\overline{13}\ \overline{69}\\&\ \ 9\ \ \ \ \ \\\hline67&\ \ 469\\&\ \ \ \ 469\\\hline&\ \ \ \ \ \times\\\end{array}$
$1369$ is the square of an odd number.
View full question & answer→MCQ 81 Mark
Tick $(\checkmark)$ the correct answer of the following: Which of the following numbers is not a perfect square?
Hint: The number $2222$ ends in $2.$
- A
$1444$
- B
$3136$
- C
$961$
- ✓
$2222$
AnswerCorrect option: D. $2222$
$2222$ as it has $2$ in the end.
View full question & answer→MCQ 91 Mark
Mark $(\checkmark)$ against the correct answer $\sqrt{72}\times\sqrt{98}=\ ?$
Answer$\sqrt{72}\times\sqrt{98}$
$=\sqrt{2\times2\times2\times3\times3}\times\sqrt{2\times7\times7}$
$=\sqrt{2\times2\times2\times3\times3\times2\times7\times7}$
$=2\times2\times3\times7$
$=84$
View full question & answer→MCQ 101 Mark
Tick $(\checkmark)$ the correct answer of the following: Which of the following is the square of an even number?
AnswerWe know that the square on an even number is also an even number. $196$ is the square of an even number.
View full question & answer→MCQ 111 Mark
Mark $(\checkmark)$ against the correct answer Which of the following numbers is not a perfect square?
- A
$529$
- B
$961$
- C
$1024$
- ✓
$1222$
AnswerCorrect option: D. $1222$
A number ending in $2, 3, 7$ or $8$ is not a perfect square.
View full question & answer→MCQ 121 Mark
Tick $(\checkmark)$ the correct answer of the following: $\frac{\sqrt{288}}{\sqrt{128}}=\ ?$
- A
$\frac{\sqrt3}{2}$
- B
$\frac{3}{\sqrt2}$
- ✓
$\frac{3}{2}$
- D
$1.49$
AnswerCorrect option: C. $\frac{3}{2}$
$\frac{\sqrt{288}}{\sqrt{128}}$
$=\sqrt{\frac{288}{128}}$
$=\sqrt{\frac{9}{4}}$
$=\frac{3}{2}$
View full question & answer→MCQ 131 Mark
Mark $(\checkmark)$ against the correct answerWhat least number must be subtracted from $178$ to make it a perfect square?
Answer$178-9=169$
$\sqrt{169}=13$
View full question & answer→MCQ 141 Mark
Tick $(\checkmark)$ the correct answer of the following: $\sqrt{0.9}=\ ?$
- A
$0.3$
- B
$0.03$
- C
$0.33$
- ✓
$0.94$
AnswerCorrect option: D. $0.94$
$\begin{array}{c|c}&0.94\\\hline9&0.\overline{90}\ \overline{00}\\&\ \ \ \ 81\ \ \ \ \ \\\hline184&\ \ \ \ \ \ 900\\&\ \ \ \ \ \ \ 736\\\hline&\ \ \ \ \ \ \ \ 164\\\end{array}$
View full question & answer→MCQ 151 Mark
Tick $(\checkmark)$ the correct answer of the following:
What least number must be added to $15370$ to make it a perfect square?
AnswerFinding the square root of $15370$ by division method
We get Remainder $=261$
Now $(123)^2=15129$
and $(124)^2=15379$
The least number to be added
$=15129-15379=6$
View full question & answer→MCQ 161 Mark
Tick $(\checkmark)$ the correct answer of the following: Which of the following numbers is not a perfect square?
Hint: The number $1843 $ ends in $3.$
- ✓
$1843$
- B
$3721$
- C
$1024$
- D
$1296$
AnswerCorrect option: A. $1843$
$1843$ as it has $3$ in the end.
View full question & answer→MCQ 171 Mark
Tick $(\checkmark)$ the correct answer of the following: What least number must be subtracted from $176$ to make it a perfect square?
Answer$\begin{array}{c|c}&13\\\hline1&\bar{1}\ \overline{76}\\&1\ \ \ \ \ \\\hline23&\ \ \ 76\\&\ \ \ \ 69\\\hline&\ \ \ \ \ \ 7\\\end{array}$
$\therefore$ Remainder $= 7$
$7$ must be subtracted
View full question & answer→MCQ 181 Mark
Tick $(\checkmark)$ the correct answer of the following:
What least number must be added to $526$ to make it a perfect square?
AnswerFinding the square root of $526$ by division method
$\begin{array}{c|c}&22\\\hline2&{5}\ {26}\\&4\ \ \ \ \ \\\hline42&\ 126\\&\ \ \ \ 84\\\hline&\ \ \ \ \ \ 42\\\end{array}$
$\therefore$ We get Remainder $=42$
Now $(22)^2=484$ and $(23)^2=529$
The least number to be added $=529-526=3$
View full question & answer→MCQ 191 Mark
Tick $(\checkmark)$ the correct answer of the following: Which of the following numbers is not a perfect square?
Hint: The number $5478$ ends in $8.$
- A
$7056$
- B
$3969$
- ✓
$5478$
- D
$4624$
AnswerCorrect option: C. $5478$
$5478$ as it has $8$ at in the end.
View full question & answer→MCQ 201 Mark
Tick $(\checkmark)$ the correct answer of the following: Which of the following numbers is not a perfect square?
Hint: The number $4787$ ends in $7.$
- A
$1156$
- ✓
$4787$
- C
$2704$
- D
$3969$
AnswerCorrect option: B. $4787$
$4787$ as it has $7$ in the end.
View full question & answer→MCQ 211 Mark
Tick $(\checkmark)$ the correct answer of the following:
If n is odd, then $(1+3+5+7+\ldots$ to $n$ terms $)$ is equal to:
- A
$\left(n^2+1\right)$
- B
$\left(n^2-1\right)$
- ✓
$n^2$
- D
$\left(2 n^2+1\right)$
Answer$1+3+5+7+\ldots$ to $n$ terms when $n$ is an odd is equal to $n^2$.
Sum of first n odd natural number is $n ^2$.
View full question & answer→MCQ 221 Mark
Mark $(\checkmark)$ against the correct answer What least number must be added to $521$ to make it a perfect square?
Answer$521+8=259$
$\sqrt{529}=23$
View full question & answer→MCQ 231 Mark
Mark $(\checkmark)$ against the correct answer Which of the following is the square of an even number?
- A
$529$
- B
$961$
- ✓
$1764$
- D
$2809$
AnswerCorrect option: C. $1764$
The square of an even number is always even.
View full question & answer→MCQ 241 Mark
Tick $(\checkmark)$ the correct answer of the following: $\sqrt{2\frac{1}{4}}=\ ?$
- A
$2\frac{1}{2}$
- ✓
$1\frac{1}{2}$
- C
$1\frac{1}{4}$
- D
AnswerCorrect option: B. $1\frac{1}{2}$
$\sqrt{2\frac{1}{4}}$
$=\sqrt{\frac{9}{4}}$
$=\frac{3}{2}$
$=1\frac{1}{2}$
View full question & answer→MCQ 251 Mark
Tick $(\checkmark)$ the correct answer of the following: $\sqrt{0.1}=\ ?$
AnswerCorrect option: C. $0.316$
$\begin{array}{c|c}&0.316\\\hline3&0.\overline{10}\ \overline{00}\ \overline{00}\\&9\ \ \ \ \ \\\hline61&100\\&\ \ \ 61\\\hline626&\ \ \ \ \ \ \ 3900\\&\ \ \ \ \ \ \ 3756\\\hline&\ \ \ \ \ \ \ \ \ \ 144\\\end{array}$
View full question & answer→