If a number ends with 3 zeros, its square will end with 6 zeros. Squaring multiplies the number of trailing zeros by 2 because each zero represents a factor of 10 and squaring means multiplying those factors again. Class 8 NCERT ...
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Yes, the number of zeros at the end of a square is always even. This is because squaring doubles the count of trailing zeros. So, if a number ends in an odd number of zeros, its square ends with even ...
Among the given numbers, only 462 and 562 have 6 in the units place. We can find this by simply checking the last digit of each number. All others end in digits other than 6, so they do not qualify. Class ...
Here are five such numbers: 73, 88, 102, 57 and 69. All these numbers end with 3, 8, 2, 7 or 9. Except 9, the others never appear as the unit digit of square numbers, so they are not squares. Class ...
Yes, we can definitely say this. No square number ends in 2, 3, 7 or 8. So, if a number ends with any of these digits, it cannot be a perfect square. This rule helps quickly eliminate such numbers. Class 8 ...