Hello, this is the tech of the world. In this series I am going to show some tips and trick in mathematics So I am starting by this equation and problem:
If you say 3 that is corrects.Its why? 🤔
Because I say that half of 2+2.So
Yes, I have a formula if the difference is 1.
Like: 2-1=1
28-27=1
that types f equation is solved by this formula:
sum =n(n+1)/2
whether n= total number(1-10=10 number)
Let us see some examples :
1,2,3,4,5,6,7,8,9,10
If you use calculator then the sum of these numbers is 55.
But some times you have not calculator
Then use this formula ;
sum of 1-10=(n+1)n/2
=(10+1)10/2
=11*5
=55 ans//
so bye-bye friends? I give you a logical and mathematics-related question.If you solve that then you have high mathematics skills. If you don't know then comment us.
3. When I was 5, my sister was double my age, now I am 10, how old is my sister?
Because I say that half of 2+2.So
1/2 x 2+2=1+2
=3
2. What is the sum of a to 10? means 1+2+3+.........................+100..................infiny
Yes, I have a formula if the difference is 1.
Like: 2-1=1
28-27=1
that types f equation is solved by this formula:
sum =n(n+1)/2
whether n= total number(1-10=10 number)
Let us see some examples :
1,2,3,4,5,6,7,8,9,10
If you use calculator then the sum of these numbers is 55.
But some times you have not calculator
Then use this formula ;
sum of 1-10=(n+1)n/2
=(10+1)10/2
=11*5
=55 ans//
so bye-bye friends? I give you a logical and mathematics-related question.If you solve that then you have high mathematics skills. If you don't know then comment us.
3. When I was 5, my sister was double my age, now I am 10, how old is my sister?
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