Tricks 4

Example - Find the square of 35.

Solution. Here, n=3

According to the rule, n(n+1)=3(3+1)=3*4=12

Therefore- Required square = 1225

n(n+1) 25 is put at the right end of n(n+1)

or 12 to get the required square of 35.

Example - Finding the square of 145.

Solution - Here, n=14

According to the rule, n(n+1)=14(14+1)=14*15=210

Therefore- Required square =21025

n(n+1) 25 is put at the right end of n(n+1)

or 210 to get the required square of 145.

**Finding the square of a number ending with 5.****In such cases, number coming before 5, say n, is multiplied with n+1 and 25 is put at the right end of the result obtained n(n+1).**Example - Find the square of 35.

Solution. Here, n=3

According to the rule, n(n+1)=3(3+1)=3*4=12

Therefore- Required square = 1225

n(n+1) 25 is put at the right end of n(n+1)

or 12 to get the required square of 35.

Example - Finding the square of 145.

Solution - Here, n=14

According to the rule, n(n+1)=14(14+1)=14*15=210

Therefore- Required square =21025

n(n+1) 25 is put at the right end of n(n+1)

or 210 to get the required square of 145.

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