Working from left to right, calculate the numbers in the order shown (without using order of operation).
Replace each question mark with a mathematical sign. Plus, minus, multiply and divide can each be used once only.
What is the highest number that can possibly be scored?
8 ? 5 ? 2 ? 6 ? 3 =
What are the highest and lowest numbers that can possibly be scored?
9 ? 3 ? 4 ? 7 ? 5 =
Replace each question mark with a mathematical sign.
Plus, minus, multiply and divide can each be used once only.
What is the highest number you can possibly score?
7 ? 6 ? 3 ? 1 ? 5 =
Calculate the number of ordered triples (A1, A2, A3) such that:
A1 ∪ A2 ∪ A3 = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} A1 ∩ A2 ∩ A3 = ∅
Write your answer as 2a3b5c7d where a, b, c, d are non-negative integers.
The digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 can be arranged into an addition sum to add up to almost any total, except that nobody has yet found a way to add up to 1984. However 9 digits can equal 1984 by an addition sum. Which digit is omitted?
Calculate the numbers below in the order shown, do not change the order of the numbers.
What are the highest and lowest numbers you can possibly score?
7 ? 4 ? 9 ? 3 ? 8 =
