Mahabir Singh Solutions for Chapter: Playing with Numbers, Exercise 1: MATHEMATICAL REASONING

HCF of two numbers $=$

A number is always divisible by $90$, if ______

The reciprocal of the smallest prime number is ______.

The two numbers which have only $1$ as their common factor are called ______.

If $5476\mathrm{a}$ is divisible by $3,$ then what can be the least value of $\mathrm{a}$?

The least number which when decreased by $9$ is exactly divisible by $12,16,24$ and $48$ is ______.

Find the greatest number which will divide the greatest $3$-digit number and the greatest $4$-digit number exactly.

The HCF and LCM of two numbers is $36$ and $720$ respectively. If one of the numbers is $180$, then the other number is ______.