what is the sum of the 1st and last?
what is the sum of 2nd and 2nd last ?
what is the sum of 3rd and 3rd last ?
Math - What is a shortcut for finding the sum of all numbers from 1-99?
math - is there a shortcut to solve organized lists if so what is the shortcut?
Math - Find the shortcut. Solve these problems. Then find and explain a shortcut...
Algebra - I want to get the first four terms of the expansion of this expression...
Statistics - Hi, My professor gave us the formulas for sample variance and ...
Math - 1.(A)(i)Show that 2+4+6+8+..+2n=n(n+1). (ii)Find the sum of the first 200...
SUMS? - what is the sum of the first towo odd numbers? what s the sum of the ...
Algebra - Is there a shortcut to foiling an equation? I always thought that FOIL...
Calculus - Evaluate the integral. HINT [Use a shortcut or see Example 4.] 4 to 3...
math - if you have 3 rows and three columns and you have to find the hidden ...