For how many whole numbers between 0 and 1000 does the sum of the digits equal 9 ?
Answer Let your whole number be ‘X’. Now, 0 < X < 1000 means that your numbers are…
-
-
How many 4-digit numbers are divisible by 3 and have 23 as their last two digits??
Answer Let X be your 4 digit number. X = ‘ab23’ = 1000a + 100b + 2*10 +…
-
15th APMO 2003 – Problem 1
Question The polynomial a8x8 +a7x7 + … + a0 has a8 = 1, a7 = -4, a6 =…
-
Proof question?
Question Prove that if gcd(a_i, m) = 1 for 1 ≤ i ≤ k, then gcd(a_1*a_2*….*a_k, m) =…
-
Please just briefly explain each topic
Question pls just briefly explain each topic. rational expressions fractional equations system of equation (word problems) quadratic…
-
Is there a difference between mathematical logic … and… logic?
Answer In a way. Mathematical logic is logic used in Math. Logic is the arguement consisting of one…
-
Can you simplify 25p/\2 over 9 by square rooting the numerater and the denominator?
Answer I will use the symbol sqrt to mean “square root”. Note that sqrt ( 25 p^2 )…
-
Logs logs logs help!?
Question Solve: 4(log(base2)x)^4 – 7(log(base2)x)^2 +3(log(base2)x) = 0 Answer Let log(base2)x = y. Then your equation becomes the…
-
Simplify – math problem (square roots or surds)?
Question: Somehow, my calculator calculates result: (√6 – √2) / 4 from √(2-√3) / 2 I need to know…