Question

what is a number between 1.56 and 1.57

Answer 1

1.561 is the number between that two number

Answer 2

$We \:know \:that$

$A \:rational \: number \: between \: \blue {a} \: and \: \green {b} \\= \frac{a+b}{2}$

$Here, a = 1.56 \:and\: b = 1.57$

$A \:rational \: number \: between \: \blue {1.56} \: and \: \green {1.57}\\ = \frac{1.56+1.57}{2}$

$= \frac{3.13}{2}\\= 1.565$

Or

By Density Property :

We can insert infinitely many rational numbers between any two rational numbers .

$1.561,1.5612 , \cdot\cdot \cdot ...etc.,$

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