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 +…
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15th APMO 2003 – Problem 1
Question The polynomial a8x8 +a7x7 + … + a0 has a8 = 1, a7 = -4, a6 =…
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Proof question?
Question Prove that if gcd(a_i, m) = 1 for 1 ≤ i ≤ k, then gcd(a_1*a_2*….*a_k, m) =…