Mathematical operation and symbol notation
- If '-' stands for '÷', '+' stands for 'x', '÷' stands for '-' and 'x' stands for '+', find out which one is correct?
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Try All option one by one
Correct Option: B
From option (b),
49 - 7 + 3 ÷ 5 x 8 = 24
Change the sign, as per the question,
49 ÷ 7 x 3 - 5 + 8 = 24
⇒ 7 x 3 - 5 + 8 = 24
⇒ 21 - 5 + 8 = 24
∴ 24 = 24
- Select the correct combination of mathematical signs to replace '*' signs and to balance the following equation.
6 * 4 * 12 * 12
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Try all option one by one.
Correct Option: D
6 * 4 * 12 * 12
From option (d),
6 x 4 - 12 = 12
⇒ 12 = 12
- If 'x' stands for '+', '<' for '-', '+' for ' ÷', '>' for 'x', '-' for '=', ' ÷' for '>' and '=' for '<', then state which of the following is true ?
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Using the proper symbols in question and solve all option one by one.
Correct Option: C
Using the proper symbols in (c), we get
5 x 2 ÷ 2 < 10 - 4 + 8
⇒ 5 x 1 < 18 - 4 ⇒ 5 < 14
which is true.
- If '-' stands for '÷', '+' stands for '-', '÷' stands for 'x', 'x' stands for '+', then which one of the following equation is correct?
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Change the proper sign according to question and try all option one by one by applying the BODMAS Rule.
Correct Option: B
Change the proper sign according to question and try all option one by one by applying the BODMAS Rule.
'-' ⇒ ÷
'+' ⇒ '-'
÷ ⇒ 'x'
'x' ⇒ '+'
∴ 70 ÷ 2 - 4 x 5 + 6 = 21
⇒ 35 - 20 + 6 = 21
⇒ 15 + 6 = 21
⇒ 21 = 21
- If '+' means '÷', '-' means '+', 'x' means '-' and '÷' means 'x', then what is the value of 24 ÷ 12 - 18 + 9 ?
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Using the proper symbols, we have
24 ÷ 12 - 8 + 9
Now Apply the BODMAS RuleCorrect Option: D
Using the proper symbols, we have
24 ÷ 12 - 8 + 9
Now Apply the BODMAS Rule,
= 24 x 12 + 18 ÷ 9
= 288 + 2 = 290