निम्नलिखित में से किस संख्या के वर्ग का इकाई अंक 1 होगा?

What is the square of 27?

What is the square of 71?

Which number must be added to 225 so that the square root of the result is exactly 16?

Find the smallest number that must be added to 1780 to make it a perfect square.

Find the cube root of 2744.