Question

Multiply 8 × 9 by Nikhilam sutra on base 10.

Answer 1

Directions –

(i) Closest base = 10, so devia-tions are -2 and -1.

(ii) Multiplication of deviations = -2 × -1 = 2.

(iii) On left hand side, write 8 – 1 = 7 or 9 – 2 = 7.

(iv) Required solution is 72.