Mathematical Operation (SSC REASONING) Part-3

Total Questions: 50

41. What will come in the place of the question mark (?) in the following equation, if '+' and '-' are interchanged and 'x' and '÷' are interchanged?

105÷2+4- 120×6 = ?

Correct Answer: (a) 226
Solution:Given :- 105÷ 2+ 4- 120 x 6
As per given instruction after
interchanging the '+' and '-' and '÷' and ,х
we get
105 x 2-4+120 ÷ 6 = 210-4+20 = 226

42. lf 'J' stands for '÷, 'V' stands for 'x', 'K' stands for '+' and 'A' stands for '-', what will come in place of the question mark (?) in the following equation?

12 J 2 K 17 A 15 V 19 = ?

Correct Answer: (c) -262
Solution:Given :-
12 J 2 K 17 A 15 V 19
According to given instruction after
interchanging the letter with sign we get,
12÷ 2+17-15 x 19
6+17-285 = - 262

43. What will come in the place of the question mark (?) in the following equation, if '+'and 'x' are interchanged and '-' and '÷'are interchanged?

35 x 96-8+3÷11 = ?

Correct Answer: (a) 60
Solution:Given:- 35 x 96-8+3÷11
As per given instruction after
interchanging '+' and 'x' and '÷' and
35+96 ÷ 8x3-11 = 35 +36- 11 = 60

44. If 'A' stands for '÷', 'B' stands for 'x', 'C' stands for '+' and 'D' stands for, '-' what will come in place of the question mark (?) in the following equation?

32 B 4 D 116 A 2 C 13 = ?

Correct Answer: (a) 83
Solution:Given:-
32 B 4 D 116 A 2 C 13
As per given instruction after
interchanging the letter with sign we get
32 x 4-116÷2+13 = 128 - 58 + 13 = 83

45. Which two numbers should be interchanged to make the given equation correct?

17 x 7+ (21÷3) x 5 - 28 + 34 = 72
(NOTE: Numbers must be interchanged and not the constituent digits e.g. if 2 and 3 are to be interchanged in the equation 43 x 3 + 4 ÷ 2, then interchanged equation is 43 × 2+4÷3)

Correct Answer: (d) 7 and 3
Solution:17 x 7+ (21÷ 3)x 5-28 +34 = 72
After checking all the options, option (d)
satisfies. After interchanging 7 and 3 we
get
17 x 3 + (21 ÷7) x 5-28+34
51 +3 x 5+6 ⇒ 51 + 15+6 = 72
L.H.S. = R.H.S.

46. If 'E' stands for '÷', 'U' stands for 'x', 'A' stands for '+' and 'C' stands for '-', what will come in place of the question mark (?) in the following equation?

16 A 24 C 30 E 15U9=?

Correct Answer: (c) 22
Solution:Given :-
16 A 24 C 30 E 15U9
As per given instruction after
interchanging the letter with sign we get
16+24-30÷15 x 9 = 40- 2x 9 = 22

47. If 'W' stands for '÷', 'Y' stands for 'x', 'Z' stands for '+' and 'A' stands for '-', what will come in place of the question mark (?) in the following equation?

11 W 11Y 11Z11 A 11 = ?

Correct Answer: (b) 11
Solution:Given :- 11 W 11 Y 11 Z 11 A 11
As per given instruction after
interchanging the letter with sign we get
11÷11 × 11 + 11- 11 = 1 x 11 + 0 = 11

48. If 'A' stands for '÷', 'B' stands for 'x', 'C' stands for '+' and 'D' stands for '-', then the resultant of which of the following will be 59?

Correct Answer: (a) 22 B 6 D 190 A 2 C 22
Solution:After checking all the options
one by one, only option (a) satisfies.
22 B 6 D 190 A 2 C 22
After interchanging letter with sign we
get
22 x 6-190÷2+ 22 = 132-95+22 = 59

49. If 'A' stands for '÷', 'B' stands for' x', 'C' stands for '+' and 'D' stands for '-' what will come in place of the question mark (?) in the following equation?

26 В 3 С 5 D 120 A 4 = ?

Correct Answer: (c) 53
Solution:Given :- 26 В 3 С 5 D 120 A 4
As per given instructions after
interchanging the letter with sign we get
26 x 3+5-120÷4 = 78+5-30 =53

50. If 'A' stands for '÷', 'B' stands for 'x', 'C' stands for '+' and 'D' stands for '-', then the resultant of which of the following will be 652?

Correct Answer: (d) 109 B 6D16A2C 6
Solution:After checking all the options
one by one, only option (d) satisfies.
109 B 6D16A2C6
As per given instructions after
interchanging the letter with sign we get
109 x 6-16÷2+6 = 654- 8 + 6 = 652