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Reasoning Aptitude

MATHEMATICAL OPERATIONS MCQs

Total Questions : 233 | Page 5 of 24 pages
Question 41. If '@' means ‘x', 'c' means ‘+’, % means (+) and '#' means '-‘, then 6 % 12 C 3 @ 8 # 3 = ?
  1.    37
  2.    35
  3.    39
  4.    33
  5.    None of these
 Discuss Question
Answer: Option B. -> 35
Answer: (b)
According to the question,
 6 % 12 © 3 @ 8 # 3 = ?
from the question by changing the alphabets, we get 
 ⇒ 6 + 12 ÷ 3 x 8 - 3 = ? (using VBODMAS rule)
⇒ 6 + 4 x 8 - 3 = ?
⇒ 6 + 32 - 3 = ?
⇒ 38 - 3 = ? 
Therefore ? = 35
Question 42. If S means '-', Q means 'X', R means ‘÷’ and P means '+’, then 1 P 45 R 2 Q 2 S 4 = ?
  1.    40
  2.    42
  3.    36
  4.    46
  5.    38
 Discuss Question
Answer: Option B. -> 42
Answer: (b)
According to the question,
 1 P 45 R 2 Q 2 S 4
from the question by changing the alphabets, we get 
= 1 + 45 ÷ 2 x 2 - 4 (using VBODMAS rule)
= 1 + 22.5 x 2 - 4
= 1 + 45 - 4 = 42
Question 43. If '-‘ stands for division '+' stands for subtraction ‘÷' stands for multiplication ‘x' stands for addition, then which one of the following equations is correct?
  1.    70 – 2 + 4 ÷5 x 6 = 44
  2.    70 - 2+ 4 ÷ 5 x 6 =21
  3.    70 -2 + 4 ÷ 5 x 6 = 341
  4.    70 – 2 + 4 ÷ 5 x 6= 36
 Discuss Question
Answer: Option B. -> 70 - 2+ 4 ÷ 5 x 6 =21
Answer: (b)
- ⇒ ÷,  + ⇒ x, ÷ ⇒ x, - ⇒ +,
From option (a),
70 - 2 + 4 ÷ 5 x 6 = 44
⇒ 70 ÷ 2 - 4 x 5 + 6 = 44
⇒ 35 - 20 + 6 ≠ 44
From option (b),
70 - 2 + 4 ÷ 5 x 6 = 21
⇒ 70 ÷ 2 - 4 x 5 + 6 = 21
⇒ 35 - 20 + 6 = 21
⇒ 41 - 20 = 21
Therefore 21 = 21
As,we got our answer, there is no need to check option (c) & (d).
Question 44. If K denotes ‘x', 'B' denotes ‘÷', ‘T’ denotes ‘-’ and 'M' denotes '+', then 40 B 8 T 6 M 3 K 4 = ?
  1.    19
  2.    11
  3.    -31
  4.    23
  5.    None of these
 Discuss Question
Answer: Option B. -> 11
Answer: (b)
According to the question,
 40 B 8 T 6 M 3 K 4 = ?
from the question by changing the alphabets, we get 
 ⇒  40 ÷ 8 - 6 + 3 x 4 = ? (using VBODMAS rule)
⇒ 5 - 6 + 12 = ?
⇒ 17 - 6 = ?
Therefore ? = 11
Question 45. Convert the signs according to the given direction and find the result of the expression?
  1.    6 + 3 > 8 = 4 + 2 < 1
  2.    4 > 6 + 2 x 32 + 4 < 1
  3.    8 < 4 + 2 = 6 > 3
  4.    14 + 7 > 3 = 6 + 3 > 2
 Discuss Question
Answer: Option C. -> 8 < 4 + 2 = 6 > 3
Answer: (c)
Using the proper notations in (c),
we get the statement as:
8 - 4 ÷ 2 < 6 + 3 or 6 < 9,
which is true.
Question 46. Convert the signs according to the given direction and find the result of the expression?
  1.    7 > 7< 7 + 7 = 14
  2.    7 ^ 7 > 7 + 7 = 7 ^ 7 > 1
  3.    7 < 7 + 7 = 6
  4.    7 + 7 > 7 = 8
 Discuss Question
Answer: Option A. -> 7 > 7< 7 + 7 = 14
Answer: (a)
Using the proper notations in (a),
we get the statement as:
7 + 7 – 7 ÷ 7 < 14
or 13 < 14,
which is true.
Question 47. Convert the signs according to the given direction and find the result of the expression?
  1.    29 < 18 + 6 = 36 + 6 ^ 4
  2.    18 > 12 + 4 x 7 > 8 ^ 2
  3.    32 > 6 + 2 = 6 < 7 ^ 2
  4.    31 > 1 < 2 = 4 > 6 ^ 7
 Discuss Question
Answer: Option D. -> 31 > 1 < 2 = 4 > 6 ^ 7
Answer: (d)
Using the proper notations in (d),
we get the statement as:
31 + 1 - 2 < 4 + 6 x 7
or 30 < 46,
which is true.
Question 48. Convert the signs according to the given direction and find the result of the expression?
  1.    13 >7 < 6 + 2 = 3 ^ 4
  2.    9 > 5 > 4 - 18 + 9 > 16
  3.    9 < 3 < 2 > 1 x 8 ^ 2 A
  4.    28 + 4 ^ 2 = 6 ^ 4+ 2
 Discuss Question
Answer: Option B. -> 9 > 5 > 4 - 18 + 9 > 16
Answer: (b)
Using the proper notations in (b),
we get the statement as:
9 + 5 + 4 = 18 ÷ 9 + 16
18 = 18,
which is true.
Question 49. Convert the signs according to the given direction and find the result of the expression?
  1.    14 > 18 + 9 =16 +4 < 1
  2.    4 >3 ^ 8 < 1 – 6 + 2 > 24
  3.    3 < 6 ^ 4 > 25 = 8 + 4> 1
  4.    12 > 9 + 3 < 6 x 25 + 5 > 6
 Discuss Question
Answer: Option B. -> 4 >3 ^ 8 < 1 – 6 + 2 > 24
Answer: (b)
Using the proper notations in (b),
we get the statement as:
4 + 3 x 8 - 1 = 6 ÷ 2 + 24
27 = 27,
which is true.
Question 50. If x means +, + means ÷, – means x and ÷ means -, then 8 x 7 – 8 + 40 ÷ 2 =?
  1.    1
  2.    7$2/5$
  3.    8$3/5$
  4.    44
 Discuss Question
Answer: Option B. -> 7$2/5$
Answer: (b)
Using the correct symbols,
we have: Given expression
= 8 + 7 x 8 ÷ 40 - 2
= 8 + 7 x $1/8$ - 2
= 6 + = 6 + $1/5$
= $ 37/5$ = 7$2/5$

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