exam Maths Puzzle Numerical Ability

evaluate

2 log 5 of 10 - 1/4 log 5 of x = log 5 of 50

Read Solution (Total 0)

exam Other Question

Express set of numbers using interval notation and set-builder notation:
numbers more than 2 units from 8

we were coming up with:
x|610; but my daughter says her teacher said the >< symbols should be going in the same direction??
log r - log t + 2 log s