Mathematical Operation (SSC REASONING) Part-3

Total Questions: 50

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

1604 x 4+87-16÷16 = ?

Correct Answer: (a) 570
Solution:Given :- 1604 x 4 +87-16÷16=?
After interchanging + and - and x and ÷
we get,
1604÷4-87+16 x 16
401-87 + 256 = 570

12. Select the correct combination of mathematical signs to sequentially place from left to right in the blanks below to balance the given equation.

75_3_17_8= 0

Correct Answer: (d) ÷, -,-
Solution:Given:- 75_3_17_8=0
After going through all the options,
option (d) satisfied.
75÷3-17- 8 = 0⇒25-17-8= 0
L.H.S. = R.H.S.

13. Which two numbers (not digits) should be interchanged to make the given equation correct?

15+5x 8-72÷4+16×3 = 101

Correct Answer: (c) 5 and 3
Solution:Given:-
15+5× 8-72÷4+16 ×3 = 101
After going through all the options,
option (c) satisfied. After interchanging 5
and 3 we get,
15+3 x 8-72÷4+16x 5 = 101
15+24-18+80 = 101 ⇒ 101 = 101
L.H.S. = R.H.S.

14. Which two signs should be interchanged to make the following equation correct?

139+40÷ 5-168 x 3 = 283

Correct Answer: (c) ÷ and x
Solution:Given :- 139+40÷5-168 x 3 = 283
After going through all the options,
option (c) satisfied. After interchanging
÷and x we get,
139 +40 x 5-168 ÷ 3 = 283
139 +200- 56 = 283
283 = 283 ⇒ LHS = RHS

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

2x16÷36 + 42 -6 = ?

Correct Answer: (a) -234
Solution:Given :- 2×16÷ 36 + 42 - 6 = ?
After interchanging ÷ and - and x with +
we get,
2+16- 36 x 42÷6=?
18-36x7 = ?
18-25 = ? ⇒ - 234

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

229÷41 + 502 × 2-44 = ?

Correct Answer: (d) 9182
Solution:Given:- 229 ÷ 41 + 502 x 2 - 44 = ?
As per given instruction after
interchanging '+' and '-' and 'x' and '÷
we get,
229 x 41 - 502÷ 2+ 44 = ?
9389-251 + 44 = ?9182

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

4-5÷9+6×2 = ?

Correct Answer: (b) 46
Solution:Given :-4-5÷9+6×2 = ?
As per given instruction after
interchanging '+' and'-' and 'x' and'÷'
we get,
4+5×9-6÷2 = ?
4+45-3=?46

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

7+4÷18- 3× 2 = ?

Correct Answer: (d) 24
Solution:7+4÷18- 3 x 2 = ?
As per given instruction after
interchanging '÷'and '-' and 'x' and '+'
we get,
7 x 4-18÷3+228-6+2 = 24

19. Select the number that will come in the place of the question mark(?), if '+' and '-' are interchanged and 'x' and '÷' are interchanged?

11÷8-78 × 6+ 37 = ?

Correct Answer: (a) 64
Solution:Given:-
11÷8-78 x 6 + 37 = ?
As per given instruction after
interchanging '+' and '' and 'x' and '÷'
we get,
11 × 8 +78 ÷ 6-37
88+13- 37 = 64

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

95-19 ×4+6÷16 =?

Correct Answer: (a) 13
Solution:Given:- 95- 19 x4+6÷16 = ?
As per given instruction after
interchanging '+' and 'x' and '-'and '÷'
we get,
95÷19+4x 6-16 = 5+24-16 = 13