math
when you reverse the digits of the number 13,the number increases by 18.how many other 2digit numbers increase by 18 when their digits are reversed ?
math
2candles,one green and one red,are lit at the same time.The green candle burns twice as fast as the red one.The green candle burns burns out after 6 hours,how much time will elapse before the red candle burns out ?
math
if i drive home with a speed of 60km/h,I will arrive an hour ealier than expected.If i drive 40km/h then i will arrive an hour later than expected.At what speed should i travel in order to arrive BANG on time?
math
4 digit number 12*6 is a perfect square.the value of the digit represented by * is ?
math
Brett and Erryn were camping and asked a farmer if they could purchase 2 litres of milk.the farmer agreed,but between them they only had an 8 litre and a 5 litre container.how can Brett and Erryn be sure of betting their 2litres of milk?
math
thanks ,but how u work it out?
math
use all digits from 1 - 9 inclusively to make a 3 by 3 magic square.each row ,column and diagonal has the same total
math
12 people are playing in a tennis comprtition.Each person must play one game against each other person.how many games are played altogether ? is it 12^11 divided by 2 = 66 thanks
math
what is the index notation of 9^6 divided by 9^3
math
27b^8c^7 divided by 3bc^5
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