Recent content by Marcelo Arevalo

Can it be tripple ratio? 4:48:2 = 6:36:x men to meter ratio defined; 12:2 = 6:x mean & extreme x = 12/12 = 1 1 day is the answer is it possible??

Maybe this will help: Let x=x= amount donated by X 1/4x=0.25x= amount donated by y 1/2x=0.50x= amount donated by z

My solution: please comment, thank you. Regular Speed = Y Express Speed = 1.2Y Time taken if Regular = x/y + 8(3)/60 (min/hr) if Express = x/1.2y + 3/60 (min/hr) Combining the two equation: we have; x/y + 24/60 = x/1.2y + 3/60 + 40/60 x/y + 24/60 =...

Is this the continuation of the given data above?? d/v + 24 = 10d/12v + 40 12d + 288v = 10d + 480v 2d = 480v -288v d = 96vfrom 1 : tR = 96v/v + 24 = 120 from 2 : tE = 960v/12v + 40 = 120

My son's solution: please comment, thank you. We can only use 4 digits : 1,2,4,8 (2^0 , 2^1, 2^2, 2^3) if we use 9 8's 8-8-8-8-8-8-8-8 and 2^n 2^27 . 2^n = 2^27 2^n = 1 8,8,8,8,8,8,8,8,8,1 only possible digits if true are 9 8's. _8_8_8_8_8_8_8_8_8 = 10 spaces to...

How many 10-digit numbers are there such that the product of its digits is equal to 2^{27}?

On a particular bus line, between Station A and Station J, there are 8 other stations. Two types of buses, Express and Regular, are used. The speed of an Express bus is 1.2 times that of a Regular bus. Regular buses stop at every station, while Express buses stop only once. A bus stops for 3...

I came across this problem in a book that I am reding. Find All Triples (a, b, c) if a! = 4(b!) + 10(c!)there is an answer key : (4, 1, 2) (6, 5, 4) (14, 13, 3)sorry I am not being lazy to solve this.. the truth is I don't know how to begin with in solving this kind of problem. can you...

Meaning, there's no such thing as the smaller value, and at the same time greater than the greater value?

What is the Largest possible value of n such that there is a multiple of 4 less than n^2 but greater than n^2 + 2016/n^2 ?

Sorry It took me a while to fully understood this number theory.

Using 1st equation 12 + 11x 12 + 11(0) = 12 * 99 = 1188 12 + 11(1) = 23 * 99 = 2277 12 + 11(2) = 34 * 99 = 3366 12 + 11(3) = 45 * 99 = 4455 12 + 11(4) = 56 * 99 = 5544 12 + 11(5) = 67 * 99 = 6633 12 + 11(6) = 78 * 99 = 7722 12 + 11(7) = 89 * 99 = 8811 12 + 11(8) = 100 * 99 = 9900 using equation...

How many 4 digit multiples of 99 are there whose digits are all distinct? - - - Updated - - - 99 x 11 = 1089 99 x 13 = 1287 99 x 14 = 1386 99 x 15 = 1485 and so on.. Is there any algebraic expressions for this?

Using Greg1313 : A------------B----X-----C AB = 24 km + BC = 16 km t = 40 / 60 = 2/3 hr XC = 10 km v = 10 km / 2/3 hr = 15 Kph To Check : AC = 40 / 60 = 2/3 hr XC = 10 / 15 = 2/3 hr AB = 24/60 = 2/5 hr XB = 6/15 = 2/5 hryes.. the speed of Ken's bike is 15 Kph.Thank you all !

Sorry I am used to a trial & error solution. I am practicing to solve mathematics problem using the algebra solutions. that's why I keep on asking for your help. so I cam polished my thoughts and put it into a detailed solutions.