If 2 = 10 3=56 4 = 160 Then 5 =

If it takes 3 men 24 minutes to unload a truck, how long would it take for 7 men to unload the same truck?

From a mathematical perspective, if 3*24=72 man-minutes are needed to unload the truck, then it would take 7 men 72/7=10.29 minutes to do it.But not all jobs respond to having more manpower thrown at them, and this may be one of those cases. With more than double the number of men, they may wind up getting in each other’s way and therefore not saving as much time as anticipated.

How can I find the total number of prime factors in the expression (4) 11 x (7) 5 x (11)?

Here is the answer As you asked for only prime factors for the given number4^11=2^227^511So only prime number who can divide this are 2,7,11 they are 3 in total.Math questions is here check thisHard Math Olympiad 1 |The Abel Competition |The Norwegian Mathematical Olympiad|IMO|RMO|SMO

What is the next number in the following sequence 2,4,7,10,15,18,23?

This is a very interesting question which i I loved solving. Unlike most of the other puzzles this does not have a straight forward simple formula. This sequence follows this simple logic: Prime(n)+n-1Here Prime(n) is the nth prime of the prime numbers.So if n=1 then: Prime(1)+1-1 = 2+1-1 = 2          n=2 then: Prime(2)+2-1 = 3+2-1 = 4          n=3 then: Prime(3)+3-1 = 5+3-1 = 7 and so on...The next number in the series should be: Prime(8)+8-1 = 19+8-1 = 26The next number in the series is 26.

If 12 men are working 8 hours a day and they complete the job in 5 days then how many men working for 10 hours a day complete the same job?

We will use Chain Rule to solve this question.According to Chain Rule, the work efficiency remains constant.[math]\dfrac {W}{WF \times T} [/math]= ConstantHere W = Work Done, WF = Workforce, T = Time.Let the number of men needed be 'x'.Applying Chain Rule,[math]\dfrac {W}{12 \times 8 \times 5} = \dfrac {W}{x \times 10 \times 5} [/math]Or, [math]x = 9.6[/math] MenSo, you need 10 men approximately. (Answer)

What is the sum of the first 20 terms of the series 3, 4, 6, 9, 13...?

A simple solution:That series can be expressed as 3+0+3+1+3+3+3+6+3+10 etc.The numbers which are not 3 (except for 1) are:0, 1, 3, 6, 10, ...It can be expressed as0, 0+1, 0+1+2, 0+1+2+3, 0+1+2+3+4, etc.It's like if we were adding up the total number of blocks used to build a pyramid, adding 1 block to each layer we add.The 20th number of that series is 0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19 (since every number gets to blablabla+[its position on the series-1]), which equals to 19*10=190 (10 groups which add up to 19, 0 and 19, 1 and 18, etc.)Then we should figure out how much is 0+1+3...+190On the series there are 20 zeroes, 19 1s, 18 2s, etc.0*20+1*19+2*18+3*17+4*16+5*15+6*14+7*13+8*12+9*11+10*10+11*9+12*8+13*7+14*6+15*5+16*4+17*3+18*2+19*1+20*0or2(0+19+36+51+64+75+84+91+96+99)+100 because when it gets to 10*10 the terms are the same back to 20*0.That thing equals 1330 (thanks calculator)Then we just have to add 3*20=60 to that (from the 2nd series which is 3+3+3...+3+3, 20 times the number 3), which results in 1330+60=1390.So the sum of every number up to the 20th position of that series is 1390.

If 2+3=8, 3+7=27, 4+5=32, 5+8=60, 6+7=72 then  the value of 7+8 is =?

-A2A-2 + 3 = 2*(2-1+3) = 83 + 7 = 3*(3-1+7) = 274 + 5 = 4*(4-1+5) = 325 + 8 = 5*(5-1+8) = 606 + 7 = 6*(6-1+7) = 72So, 7 + 8 = 7*(7-1+8) = 98

What would be the next term in the following series of 13, 17, 25, 32, and 37?

The guy nailed it...it all depends in what relationship you think about... which chapter is this question from?(Edit)The answer is 47.. the difference between the numbers is equal to the sum of the digits of the first number...For example:13 and 17 are the first two terms,1+3=4And17-13=4.. it is true for all the terms, so the last term is 47..How?3+7=10..10+37=47.that is the answer..