M L Aggarwal Solutions for Chapter: Playing With Numbers, Exercise 1: Exercise

Check whether $345046$ is divisible by $3$ or $9$ not?

If $42z3$ is a multiple of  $9$, where $z$ is a digit, find the value(s) of $z$?

In $49*2207$ replace $*$ by a digit so that the number formed is divisible by $9$.

In $5938*623$ replace $*$ by a digit so that the number formed is divisible by $9$.

In $97*542$ replace $*$ by a digit so that the number formed is divisible by $6$.

In $709*94$ replace $*$ by a digit so that the number formed is divisible by $6$.

In $64x2456$ replace $x$ by a digit so that the number formed is divisible by $11$.

In $86x6194$ replace $x$ by a digit so that the number formed is divisible by $11$.