symbolic operations Model Questions & Answers, Practice Test for ssc chsl tier 1

Question :21

If '★' means '×', '$' means '+', '#' means '÷' and '©' means '-'; then what will be the value of the following expression?
360 # 24 $ 56 ★ 5 © 48

Answer: (b)

? = 360 ÷ 24 + 56 × 5 – 48

⇒ ? = 15 + 280 – 48 = 247

Question :22

'+' means '×', '–' means '÷', '÷' means '+' and '×' means'–' ; then what will be the value of the following expression?
540 – 36 + 12 ÷ 75 × 55

Answer: (e)

? = 540 ÷ 36 × 12 + 75 – 55

or ? = 15 × 12 + 75 – 55

or ? = 180 + 75 – 55 = 200

Question :23

If ' - ' means addition] ' × ' means subtraction] ' ÷ ' means multiplication and ' + ' means division; then what will be the value of the following expression?
20 × 12 + 4 - 16 ÷ 5 = ?

Answer: (c)

- ⇒ +× ⇒ -
÷ ⇒ ×+ ⇒ ÷

20 × 12 + 4 – 16 ÷ 5 = ?

or ? = 20 – 12 ÷ 4 + 16 × 5

or ? = 20 – 3 + 80 = 97

Question :24

'P' indicates '+'; 'R' indicates '÷'; 'T' indicates '–' and 'W' indicates '×'; then what will be the value of the following expression?
40 R 8 W 10 T 12 P 16 = ?

Answer: (e)

40 R 8 W 10 T 12 P 16 = ?

or ? = 40 ÷ 8 × 10 -12 + 16

or ? = 5 × 10 - 12 + 16

or ? = 66 - 12 = 54

Question :25

If ' + ' means ' ÷ ', ' ÷' means ' × ', ' × ' means ' - ' and ' - ' means ' + ' ; then what will be the value of the following expression?
15 ÷ 5 × 9 + 3 - 6 = ?

Answer: (a)

15 ÷ 5 × 9 + 3 - 6 = ?

or ? = 15 × 5 - 9 ÷ 3 + 6

or ? = 15 × 5 -3 + 6 or ? = 81 - 3 = 78

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