SOF International Mathematics Olympiad (IMO)
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IMO Level 1
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Sample
What is the smallest 4-digit number divisible by 9?
Explanation
Explanation
1008 is divisible by 9 because 1+0+0+8=9.
PRO TIP
Re-check your working by substituting the answer back into the original question.
Related Questions
A shopkeeper marks a watch at ₹1,000 and allows a 10% discount. Even after the discount he earns a profit of 20% on the cost price. Find the cost price of the watch.