Question

2x3=13
3×4=25
4×5=41
5×6=61
6×7=??

Answer 1

${2 }^{2} \times {3}^{2} = 4 + 9 = 13$
similarly
${6}^{2} + {7}^{2} = 36 + 49 = 85$

Answer 2

Sum of square of both numbers is equal to right hand side number.

Hence 6×7 = 6^2 + 7^2

= 36+49

= 85.

Hope it's helpful to u.