To square any number ending in 4; i.e.
14, 24, 34...94…124..., first square the next number that is ending in 5 (using
the trick “squaring numbers ending in 5"),
and then subtract the number and the next number from it.

The number to be squared is 64 and the
number next to it is 65. Finding square of 65 is quite simple as it ends in ‘5’.
Based on "squaring numbers ending in 5", we know that 65

^{2}= 4225.
So, 64

^{2}= 65^{2}- (64 + 65) = 4225 - 129 = 4096**To square 94:**

The number next to 94 is 95.

Based on "squaring numbers ending
in 5”; 95

^{2}= 9025.
So, 94

^{2}= 95^{2}- (94 + 95) = 9025 - 189 = 8836**124**

^{2}=?
124

^{2}= 125^{2}- (124 + 125) = 15625 - 249 = 15376
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