Mathematical Operation (SSC REASONING) Part-4

Total Questions: 50

1. 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 1049?

Correct Answer: (c) 94 B 11 D 180 A 4 C 60
Solution:After going through all the
options, option c satisfies.
94 B 11 D 180 A 4 C 60
As per given instruction after
interchanging the letter with sign we get,
94 x 11- 180÷4 +60
1034-45 + 60 = 1049

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

69+15- (14 x 4) ÷ 2+ (48 ÷ 3) = 58
(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 x 2+4÷3)

Correct Answer: (d) 69 and 48
Solution:Given :- 69 + 15 - (14 x 4)÷2
+ (48÷3) = 58
After checking all the options, option (d)
satisfies. After interchanging 69 and 48
we get
48+15-(56) ÷ 2+ (69÷3)
63-28+ 23 = 58
L.H.S. = R.H.S.

3. What will come in the place of '?" in the following equation if '+' and 'x' are interchanged and '-' and '÷' are interchanged?

21-7 x 26 + 46 ÷ 36 = ?

Correct Answer: (b) 1163
Solution:Given:- 21 -7 x 26+ 46÷36
As per given instruction after
interchanging '+' and 'x' and '-' and '÷' we
get 21÷7+ 26 x 46 - 36
3+1196 - 36 = 1163

4. What will come in place of'?' in the following equation, if '+' and '-'are interchanged 'x' and '÷' are interchanged?

15+2-13 × 13÷ 3 = ?

Correct Answer: (d) 16
Solution:Given :-15+2-13 x 13 +3
As per given instruction after
interchanging '+' and '-' and 'x' and '+'
15-2+13 ÷ 13 x× 3 = 13+ 1x 3 = 16

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

136-(176÷11) x 8 + 22 x 3 = 105
(NOTE: Numbers must be interchanged and not the constituent digits e.g. if 2 and 3 are to be interchanged in the equation 43 × 3 + 4 ÷ 2, then interchanged equation is 43 × 2+4÷3)

Correct Answer: (b) 11 and 22
Solution:Given :- 136 - (176 ÷ 11) x 8
+ 22 x 3 = 105
After checking all the options, option (b)
satisfies. After interchanging 11 and 22
we get
136- (176 ÷ 22) x 8 + 11 x 3
136- (8) x 8+33
136-64+ 33⇒ 136 - 31 = 105
L.H.S. = R.H.S.

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

39 +13 × 12 ÷5-4=?

Correct Answer: (b) 11
Solution:Given :- 39 + 13× 12 ÷ 5 - 4
As per given instruction after
interchanging the '+' and'+and 'and 'x'
we get
39+13-12+5 x 4 ⇒ 3-12 + 20 = 11

7. 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?

28 В 7 D 176 A 8 C 13 =?

Correct Answer: (a) 187
Solution:Given :-
28 B 7 D 176 A 8 C 13
As per given instruction after
interchanging the letter with sign we get
28 x 7-176÷ 8+ 13
196 - 22+13 ⇒196 - 9 = 187

8. 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?

321 A 3 C 11 В 10 D 19 =?

Correct Answer: (b) 198
Solution:Given :-321 A 3 C 11 B 10 D 19
As per given instruction after
interchanging the letter with sign we get
321÷ 3 + 11 × 10-19
107+110-19= 107+91 = 198

9. What will come in the place of '?" in the following equation if '+' and '-' are interchanged and 'x' and '÷' are interchanged?

18÷9+24 x 3 - 16 = ?

Correct Answer: (d) 170
Solution:Given :- 18 ÷ 9+24 x 3-16
As per given instruction after
interchanging '+' and '-' and 'x' and'+'
18 x 9-24÷3+16 = 162-8+16=170

10. 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? 91 B 2 D 22 A 11 C8 = ?

91 B 2 D 22 A 11 C8 = ?

Correct Answer: (b) 188
Solution:Given:- 91 B 2 D 22 A 11 C 8
As per given instruction after
interchanging the letter with sign we get
91 x 2-22÷ 11 + 8 = 182-2+8= 188