use the short-cut method to find the square of the following numbers which end in 5: (i) 55² step by step explain
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55 × 55 is 3025
there is a small trick behind this:
step 1, leave 2 space and then square the last digit [ _ _ 25]
step 2, now, you add 1 to the first digit and multiply with the first digit of second number [ 5+1 = 6 × 5 = 30]
now, combine both steps
we get
55 × 55 = 3025
similarly
15× 15 = 225
25× 25 = 62 5
35× 35 = 1225
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