Question

Given: 2x8=16, 12x18=216, 22x28=616, 32x38= 1216, 42x48=2016
Find the pattern. How can you find the answer of 62x68 without actually doing the multiplication? Explain in one sentence and find the answer.

Answer 1

The pattern is to multiply the tens digit by the next multiple of 10 and then add the product of the units digits, and applying this pattern to 62x68 we get 6x70+16=436.