Question

Tumelo used his calculator to work out the value of 3,12×4,36. He wrote down the answer as 136,032.
What simple check could tumelo have used without using his calculator to show his answer is incorrect

Answer 1

or, just note that 3*4 = 12
which is a lot less than 136

Answer 2

Tumelo could have checked that the answer is not divisible by 3, since 3,12 and 4,36 are both divisible by 3.