R. S. Aggarwal Solutions for Chapter: Mathematical Operations, Exercise 1: Exercise

If $\$$ means $+, \#$ means $-, @$ means $\times$ and $\times$ means $÷$ then what is the value of $16 \$ 4 @ 5$?

If Q means 'add to', J means 'multiply by', T means 'subtract from' and K means 'divide by', then $30 \mathrm{K} 2 \mathrm{Q} 3 \mathrm{J} 6 \mathrm{T} 5=$?

If P means 'division', T means 'addition', M means 'subtraction' and D means 'multiplication', then what will be the value of the expression $12 \mathrm{M} 12 \mathrm{D} 28 \mathrm{P} 7 \mathrm{T} 15$?

In an imaginary language, the digits $0,1,2,3,4,5,6,7,8$ and $9$ are substituted by a, b, c, d, e, f, g, h, i, and j. And $10$ is written as ba.

$(\mathrm{cd}+\mathrm{ef})\times \mathrm{bc}$ is equal to:

In an imaginary language, the digits $0,1,2,3,4,5,6,7,8$ and $9$ are substituted by a, b, c, d, e, f, g, h, i, and j. And $10$ is written as ba.

$\mathrm{dc}\times \mathrm{f}-(\mathrm{bf}-\mathrm{d})\times \mathrm{d}$ is equal to:

In an imaginary language, the digits $0,1,2,3,4,5,6,7,8$ and $9$ are substituted by a, b, c, d, e, f, g, h, i, and j. And $10$ is written as ba.

$\mathrm{baf}÷\mathrm{bf}\times \mathrm{d}$ is equal to:

In an imaginary language, the digits $0,1,2,3,4,5,6,7,8$ and $9$ are substituted by a, b, c, d, e, f, g, h, i, and j. And $10$ is written as ba.

$\mathrm{bee}+\mathrm{fg}-(\mathrm{ca}\times \mathrm{h}/\mathrm{be})$is equal to:

If $>$ denotes $+,<$ de $-$ notes $-, +$ denotes $÷,\wedge$ denotes $\times , -$ denotes $=, \times$ denotes $>$ and $=$ denotes $<$, choose the correct statement in each of the following questions.