Question

Find the missing number.

$35˸45\colon\colon ?˸9$

Answer 1

Given:

$35˸45\colon\colon ?˸9$

Here one mean is missing

$\mathrm{One}\mathrm{mean}=\frac{\mathrm{Product}\mathrm{of}\mathrm{extremes}}{\mathrm{other}\mathrm{mean}}$

$=\frac{35\times 9}{45}$

$=7$

Hence, the missing number is $7$.