Exam Tips
The Fastest Way To Square Numbers Ending In 5 (Mental Maths Trick)
Notes from my video on The Fastest Way To Square Numbers Ending In 5 (Mental Maths Trick)
By DevPublished 22 · 7 · 2026Updated 22 · 7 · 2026
(n5)^2
(n x (n+1))^2 and then ends in 25
basically multiply the first number with the number after it
eg) 3 x 4 = 12