<input type="number" min="10" max="20" placeholder="10">
<input type="number" min="5" max="10" placeholder="5">
<input type="number" min="7" max="15" placeholder="7">
<div class="block">Hello, world!</div>
let hideBlock = true
document.querySelectorAll('input')
.forEach(input => {
// console.log(input.min, input.max, input.value)
if (input.value && +input.value > +input.min)
hideBlock = false
})
if (hideBlock) {
document.querySelector('.block').style.display = 'none'
} else {
document.querySelector('.block').style.display = 'block'
}