exam Maths Puzzle Numerical Ability

Reduce the following to a single logarithm

2log2-3log4+log6

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exam Other Question

YESTERDAY YOU BOUGHT A HUGE WATERMELON THAT WEIGHS 100 POUNDS. A WATERMELON IS 90% WATER. YOU LEFT IT OUTSIDE IN THE HOT SUN. SOME OF THE WATER EVAPORATED, SO IT IS NOW 80% WATER. HOW MUCH DOES THE WATERMELON WEIGH NOW? The length of a field is equal to 120m more than its width. If the pèrimètre (distance around) equals
560 m, find dimensions of this camp.