SOF International Mathematics Olympiad (IMO)
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IMO Level 1
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Sample
If 7 pens cost ₹84, the cost of 12 pens is:
Explanation
Explanation
One pen costs ₹12, so 12 pens cost ₹144.
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.