Question

What will come in place of the question mark $(?)$ in the following question?
$$34.667-15.597-8.491-0.548=?$$
$(a)\text{ 14}\text{.403}$
$(b)\text{ 10}\text{.031}$
$(c)\text{ 18}\text{.301}$
$(d)\text{ 21}\text{.043}$
$(e)\text{ None of these}$

Answer 1

Hint: Perform the operations on the decimal values carefully. Solving two at a time can minimise errors.

We have the given expression as
$$34.667-15.597-8.491-0.548=?$$
Let us assume the missing term to be $x$, then we have
$$34.667-15.597-8.491-0.548=x$$
$$34.667-15.597-9.039=x$$
$$34.667-24.636=x$$
$$\therefore x=10.031$$
Hence, the required solution is $(b)\text{ 10}\text{.031}$.

Note: To solve these types of questions, assume some value for the asked sign and substitute it in the given equation to obtain the required solution.