MCQ

Question 11 Mark

If P means '-', Q means '+', R means '÷' and S means 'x', then find the value of 15 P 12 Q 12 R 4 S3.

Answer

c.Given expression becomes,
$15 - 12 + 12 \div 4 \times 3$
15 -12 + 3 x 3
15 -12 + 9 = 12

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Question 21 Mark

If A stands for '+, B stands for '-' and C stands for 'x', then find the value of (14 A 10) B (14 C 2).

Answer

b.Given expression becomes
(14 + 10) - (14 x 2) = 24 - 28 = -4

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Question 31 Mark

If '+' denotes 'x', '÷' denotes '-' '-' denotes '+' and 'x' denotes '÷' then find the value of $54 - 72 \times 18 + 12 \div 36.$

Answer

a.66

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Question 41 Mark

If '+' denotes 'x', '-' denotes '÷', 'x' denotes '+' and '÷' denotes'-', then find the value of 115 × 17 + 81 - 3 - 4.

Answer

a.Given expression becomes, $115 + 17 - 81\div 3\times 4 = 115 + 17 - 27 \times 4$
115 + 17 - 108 = 24

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Question 51 Mark

If'-' stands for division, '÷' stands for multiplication,'÷' stands for subtraction and 'x' stands for addition, then find the value of 75 x 5 ÷ 80 - 16 + 3.

Answer

d. The given expression becomes :
$75 + 5 - 80\div 16\times 3 = 75+ 5 - 5 \times 3$
= 75 + 5 -15 = 65

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Question 61 Mark

If 'M' stands for 'subtraction', 'N' stands for 'multiplication', 'P' stands for 'addition' and 'R' stands for 'division', then find the value of 19 N 3 M 16 R 8 P 6.

Answer

b. b.Given expression becomes
$19 \times 3 -16 \div 8 + 6 = 19 \times 3 - 2 + 6$
$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$= 57-2+6=61

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Question 71 Mark

If 'x' denotes '+', '-' denotes '÷', '+' denotes 'x' and '÷' denotes '-', then which of the following equation is correct?

Answer

a.Using the proper notations in option (A), we get
LH.S.$= 5 + 6 - 4 \div 4 \times 3 = 5 + 6 - 1 \times 3$
= 5 + 6 - 3 = 8 = R.H.S

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Question 81 Mark

Which of the following interchange of signs will make the following equation correct?
(16 - 4) x 6 ÷ 2 + 8 = 30

Answer

a. a.On interchanging + and -, we get
LHS.=$(16 \div4) × 6 -2+8$
=4 x 6 - 2 + 8 = 24 - 2 + 8
= 30 = R.H.S.

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Question 91 Mark

If 'P' means '+', 'Q' means 'x', 'R' means '-' and 'S' means '÷', then the value of 38 P 4 Q 4 S 2 R 6 is

Answer

a. Given expression becomes
$38 + 4 \times 4 \div 2 - 6 = 38 + 4 \times 2 - 6$
= 38 + 8 - 6 = 40

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Question 101 Mark

If '-' stands for 'division', 'x' stands for 'addition', '+' stands for 'subtraction' and '÷' stands 'multiplication', then find the value of 32 + 18 - 3 ÷ 6 × 16.

Answer

D. Given expression becomes
$32-18\div 3 \times 6 +16$
$=32 - 6 \times 6 + 16$
$=32 - 36 + 16 = 12$

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Question 111 Mark

Which of the following interchange of signs would make the given equation correct?
$5+6 \div 3-12 \times 2=17$

Answer

a. On interchanging and x, we get
L.H.S. = 5 + 6 x 3 - 12 ÷ 2 = 5 + 6 × 3 - 6
= 5 + 18 - 6 = 17 = R.H.S.

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Question 121 Mark

If J is written as '+', K is written as 'x', L is written as '-' and M is written as '÷', then what is the value of 34 M 2 J 17 K 2 L 7 ?

Answer

a. Given expression becomes
34 ÷ 2 + 17 × 2 - 7 = 17 + 17 × 2 - 7
= 17 + 34 - 7 = 44

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Question 131 Mark

If the digits '7' and '3', and signs '-' and 'x' are interchanged on the left hand side in each option, then which of the following becomes correct?

Answer

c. On interchanging (7 and 3) and (- and x), we have
(A) 7 - 3 × 4 = 7 - 12 ≠ 55
(B) 4 x 7 - 3 = 28 - 3 = 25≠ 31
(C) 3 x 4 - 7 = 12 - 7 = 5
(D) 3 - 4 x 7 = 3 - 28 - 25 ≠ 28

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Question 141 Mark

If 'N' means 'x', 'M' means '+','P' means '+' and 'Q' means '-', then the value of 16 P 24 M 8 Q 6 M 2 N 3 =

Answer

d. Given expression becomes
16 + 24 ÷ 8 - 6 ÷ 2 × 3
= 16 + 3 - 3 × 3 = 16 + 3 - 9 = 10

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Question 151 Mark

If '÷' stands for '-', '-' stands for 'x', 'x' stands for '+' and '+' stands for '÷', then which of the following equation is correct?

Answer

b.Using the proper notations in option
(B), we get L.H.S. = 8 x 6-4-3+9
$=8 \times \frac{3}{2}-3+9=12-3+9=18=$ R.H.S.

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Question 161 Mark

If 'x', denotes '-', '-' denotes '+', '+' denotes '÷' and '÷' denotes 'x', then the value of 31 x 27 + 3 - 24 ÷ 2 is

Answer

a. Given expression becomes
31 - 27 ÷ 3 + 24 × 2 = 31 - 9 + 24 x 2
= 31 - 9 + 48 = 70

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Question 171 Mark

In the following equation, two signs need to be interchanged to make it correct. Choose the signs from the given options.
3 × 5 + 3 - 18 ÷ 3 = 12

Answer

c. On interchanging x and +, we get
L.H.S. = 3 + 5 x 3 - 18 ÷ 3 = 3 + 5 × 3 - 6
= 3 + 15 - 6 = 12 = R.H.S.

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Question 181 Mark

If 'D' denotes 'addition', 'E' denotes 'multiplication', 'F' denotes 'division' and 'G' denotes subtraction, then what is the value of 25 E 12 5 F 5 G 225 D 5 ?

Answer

c. Given expression becomes
25 x 125 ÷ 5 - 225 + 5 = 25 x 25 - 225 + 5
= 625 - 225 + 5 = 405

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Question 191 Mark

If '÷' is written as '-', 'x' is written as '+', '-' as written is '÷' and '+' is written as 'x', then the value of 15 × 17 + 8 - 2 ÷ 12 is

Answer

d. Given expression becomes
15 + 17 x 8 ÷ 2 - 12 = 15 + 17 × 4 - 12
15 + 68 - 12 = 71

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Question 201 Mark

If '-' stands for '+', '+' stands for '-', 'x' stands for '+' and '+' stands for 'x', then which of the following is correct?

Answer

b.(A) 40 + 10 - 20 ÷ 10 × 4 = 42 $\neq$ 40
(B) 10+8×4+8-9=5
(c)$31-5 \div 3 \times 4+9=\frac{100}{3} \neq 21$
(D) 40+30+10-5×7=8≠10

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Question 211 Mark

If 'A' stands for 'multiplication', 'B' stands for 'division', 'C' stands for 'subtraction' and D stands for 'addition', then find the value of 21 B 3 A 9 D 15 C 42.

Answer

a. Given expression becomes
21 ÷ 3 x 9 + 15 - 42
= 7 x 9 + 15 - 42 = 63 + 15 - 42 = 36

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Question 221 Mark

Which of the following interchanges in signs would make the given equation correct? $14 \times 7 - 14 + 10 \div 12 = 5$

Answer

$\text {On interchanging } \div \text { and }- \text {, we get }$
$\text { L.H.S. }=14 \times 7 \div 14+10-12$
$=14 \times \frac{1}{2}+10-12$
$=7+10-12$
$=5=\text { R.H.S. }$

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Question 231 Mark

If 'J' means ' +', 'K' means '-', 'L' means 'x' and 'M' means ' +', then what is the value of 13 L 7 K 24 J 4 M 3 ?

Answer

d. Given expression becomes
13 x 7 - 24 ÷ 4 + 3 = 13 × 7 - 6 + 3
= 91 - 6 + 3 = 88

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Question 241 Mark

If 'x' denotes '-', '+' denotes'÷', '-' denotes '+' and '÷' denotes 'x', then find the value of 18+3×6-12÷2.

Answer

a. Given expression becomes
18 ÷ 3 - 6 + 12 x 2 = 6 - 6 + 24 = 24

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Question 251 Mark

If 'A' stands for '÷', 'B' stands for '-', 'C' stands for '+' and 'D' stands for 'x', then what is the value of 12 D 16 A 4 C 8 B 20 ?

Answer

D.Given expression becomes
12 × 16 ÷ 4 + 8 - 20 = 12 × 4 + 8 - 20
= 48 + 8 - 20 = 36

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