Kartik Singh Solutions for Chapter: Arithmetical Reasoning, Exercise 1: Exercise 1

Reena is twice as old as Sunita. Three years ago, she was three times as old as Sunita. How old is Reena now?

If Vivek's age is five times Mahesh's age, Vivek is twice as old as Rahul, who is three years older than Mahesh. Find the age of Rahul?

'$*$' Stands for any of the mathematical signs at different places which are given as choices under the question select the choice with the correct sequence of signs which when substituted makes the question as a correct equation.

$30 * 5 * 8 * 12 * 15=51$

If $15+8\times 6=13, 76+8\times 10=78$, then $15+6\times 8=?$

Select the correct combination of mathematical signs to replace '*' signs and to balance the given equation

$24 * 34 * 2 * 5 * 12$

If $A$ denotes $\times$, $D$ denotes $+$, $K$ denotes $÷$ and $N$ denotes $-$, what is -

$20 D 15 A 6 N 13 A 4 = ?$

 If '$+$' means '$÷$', '$\times$' means '$-$', ’$÷$ ‘means '$+$' and ‘$-$‘means '$\times$', then 
$16÷8\times 6-2 +12 = ?$

In a certain code language, '$\times$' represents '$+$', '$+$' represents '$\times$','$-$' represents '$÷$' and '$÷$' represents ‘$-$’. Find out the value of
$25 + 2 -10 ÷ 10 \times 6 = ?$