symbol substitution Practice Questions Answers Test with Solutions & More Shortcuts

mathematical operations PRACTICE TEST [2 - EXERCISES]

symbol substitution

balancing the equations

Question : 1 [S.S.C. (CPO) 2008]

If '-‘ denotes addition, ‘+' denotes subtraction, ‘×' denotes division and ÷ denotes multiplication, then 7 -10 × 5 ÷ 6 + 4 =?

a) 3

b) 12

c) 15

d) 9

Answer: (c)

According to the question,

? =  7 - 10 × 5 ÷ 6 + 4

from the question by changing the symbols, we get

= 7 + 10 ÷ 5 × 6 - 4 (using VBODMAS rule)

=7 + 2  × 6 - 4

= (7 + 12) - 4

= 15

Question : 2 [S.S.C. (10+2) 2013]

If '+' means 'minus', ‘-‘, means 'multiply’, ‘÷’ means ‘plus’ and '×' means 'divide', then 10 × 5 ÷ 3 - 2 + 3 = ?

a) 5

b) $53/3$

c) 21

d) 36

Answer: (a)

According to the question,

? = 10 × 5 ÷ 3 -2 + 3

from the question by changing the symbols, we get 

= 10 ÷ 5 + 3 × 2 - 3 (using VBODMAS rule)

= 2 + 3 × 2 - 3

= 2 + 6 - 3 

= 8 - 3 = 5

Question : 3 [C.B.I. (PO) 2011]

A means ‘+', B means '-' C means ‘×' and D means ÷, then 18 C 14 A 6 B 16 D 4 =?

a) 254

b) 238

c) 188

d) 258

e) None of these

Answer: (a)

According to the question,

? = 18 C 14 A 6 B 16 D 4

from the question by changing the symbols, we get

= 18 × 14 + 6 - 16 ÷ 4 (using VBODMAS rule)

= 18 × 14 + 6 - 4

= 252 + 6 - 4

= 258 - 4 = 254

Question : 4 [C.B.I. (Clerk) 2010]

If A means '×' B means ‘÷' C means '-' and D means ‘+', then 4 D 16 A 5 B 8 C 5 = ?

a) 9

b) 16

c) 13

d) 75

e) None of these

Answer: (a)

According to the question,

? = 4 D 16 A 5 B 8 C 5

from the question by changing the symbols, we get

= 4 + 16 × 5 ÷ 8 - 5 (using VBODMAS rule)

= 4 + 16 × 0.625 - 5

=  4 + 10 - 5

= 14 - 5 = 9

Question : 5 [I.B.P.S. (PO) 2011]

If A means ‘-', B means '÷', C means ‘+' and D means '×', then 15 B 3 C 24 A 12 D 2 = ?

a) 3

b) 5

c) 7

d) 9

e) None of these

Answer: (b)

According to the question,

? = 15 B  3 C 24 A 12 D 2

from the question by changing the symbols, we get

= 15 ÷ 3 +24 - 12 × 2 (using VBODMAS rule)

= 5 + 24 -12 × 2

= 5+ 24 - 24 = 5 

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