Mathematical Operation (SSC REASONING)

Total Questions: 50

31. If + means ÷, ÷ means -, - means +, and x means x then, [SSC Stenographer 07/08/2025 (Shift 3) ]

what is (200 ÷ 50- 10) × 5+25?

Correct Answer: (a) 32
Solution:Given:-
(200÷50-10) × 5+25
After interchanging the sign we get,
(200 -50+ 10) × 5÷25
800÷25 = 32

32. If + = -,-= x, x = ÷,÷ = +; then, what is 6 + (4 x 2) -3÷1=? [SSC Stenographer 08/08/2025 (Shift 1)]

Correct Answer: (d) 1
Solution:Given, 6 + (4 x 2) -3÷1=?
As per given instruction, after
interchanging the signs we get,
=6-(4÷2) x 3+1
= 6-6+1 = 1

33. If + means -, ÷ means +, - means x, and x means ÷, then, what is [SSC Stenographer 08/08/2025 (Shift 1) ]

15-4÷6+12?

Correct Answer: (c) 54
Solution:Given, 15-4÷6+12 = ?
As per given instructions, interchanging
the signs we get,
= 15 x 4+6-12
= 66-12 = 54

34. If + = x, = +, x =, = ÷ ; then, what is (3+4) ×2-1÷5? [SSC Stenographer 08/08/2025 (Shift 1) ]

Correct Answer: (b) 10.2
Solution:Given, (3 +4) x 2-1÷5=?
As per given instructions, interchanging
the signs we get,
= (3 x 4) -2+1÷5= ?
= 12-2+ 0.2
= 10 + 0.2 = 10.2

35. If + means -, ÷ means +, - means x, and x means ÷ then, what is [SSC Stenographer 08/08/2025 (Shift 2) ]

35÷7-5+ 20?

Correct Answer: (c) 50
Solution:Given: 35÷7-5+ 20
As per given instruction interchange the
sign, we get
= 35+7 x 5-20
= 35+ 35-20
= 50

36. if + = x, - = ÷, x = +, ÷ = -; then, what is (5+2) x3-4÷2? [SSC Stenographer 08/08/2025 (Shift 2) ]

Correct Answer: (d) 8.75
Solution:Given: (5 +2) x 3 - 4 ÷ 2
As per given instruction interchange the
signs, we get
= (5 x 2) +3 ÷ 4 - 2
= 10 + 0.75 - 2 = 8.75

37. If '+'means 'x', '÷' means '-', '-', means '÷' and 'x' means '+', then, what is 150 x 25-5÷10 + 2? [SSC Stenographer 08/08/2025 (Shift 3) ]

Correct Answer: (c) 135
Solution:Given: 150 x 25-5÷10+2
As per given instructions after
interchanging the signs we get,
150 + 25 ÷ 5 -10 × 2
150 +5 - 20
150-15 = 135

38. What will come in place of the question mark (?) in the following equation? [SSC Stenographer 08/08/2025 (Shift 3) ]

729-15+4×3 = ?

Correct Answer: (c) 5
Solution:Given:- 72÷9-15+4×3
8-15+12= 5

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

108 x 2 — 14÷ 6+ 27 = ?

Correct Answer: (c) 111
Solution:Given :- 108 × 2- 14 ÷ 6+27
As per given instruction after
interchanging '+' and'-'and 'x' and '÷'
we get
108 ÷ 2+14 × 6 - 27 ⇒ 54 + 84 - 27 = 111

40. Which two numbers (not digits) and which two signs should be interchanged to yield the value 'zero' for the following expression?

13 +65÷2×8-21

Correct Answer: (d) + and ÷; 13 and 65
Solution:Given :- 13 +65÷2x 8-21
After going through all the options,
option d satisfied. After interchanging '+'
and'÷'and '13' and '65' we get
65 ÷13 + 2 × 8 - 21 ⇒ 5 +16 - 21 = 0