exam
Maths Puzzle
Numerical Ability
n+3/n+2 = n+2/n+3
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exam Other Question
While only 19 year old, Carl Friedrich Gauss proved in 1796 that every positive integer is the sum of at the most three triangular numbers.
a) Express each of the numbers 25 to 35
A colony of bacteria has 6.5 X 10^6 members at 8 A.M. and 9.75 X 10^6 members at 10:30 A.M. Find its population at noon.
I used the formula N = No X 2 ^ t/d
9.75 X 10^6 = 6.5 X 10^6 X (2)^ 2.5/d
how do i work from here?