निम्नलिखित में से कौन-सा किसी प्राकृतिक संख्या का वर्ग नहीं हो सकता है?

What is the remainder when (120)188 is divided by 7?

What is the unit digit of the product of all even numbers between 1 and 11?

When a number is divided by 136, it leaves a remainder of 36. If the same number is divided by 17, what will be the remainder?