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Maths IQ Puzzle

Maths IQ Puzzle - 17 February

Indiana Jones has stolen two solid gold bars from a treasure. But now, the village people are behind him. While running away from them, he comes across a bridge formed by a single rope. Now he knows that he can cross the bridge on that rope. But there is a signboard which reads that the rope can carry a maximum weight of 130 pounds only.

Now, the gold bar weighs 20 pounds each and he weighs 100 pounds. How will he cross the bridge now given that he can't leave the gold bar behind and he don't have enough time to return back and take them one by one ?

For Solution : Click Here


  1. He will cross the bridge by juggling the gold bars.

  2. He wont cross the bridge at all.Its indiana jones! He will let the rope break and swing accross like he always does

  3. If you know about the weighing systems, you must be knowing that gold is weighed in Troy system while otherwise normally, the weight is measured using the imperial system.

    In Troy system, 12 ounces = 1 pound.
    In imperial system, 16 ounces = 1 pound

    Thus, 40 pounds of gold weighed in Troy system will be only 30 pounds in the imperial system of weighing. The weight limit for the rope must be in imperial system only as that is the standard weighing system.

    Thus the total weight = 100 + 30 = 130 pounds and all he will do is simply walk it carrying both the gold bars.

  4. He doesn't able to cross the bridge.

  5. That solution is incorrect. We are comparing two measurements to each other. The bridge, I'm sure, is rated in Imperical units. The problem does not state the gold he is carrying is Troy or Imperical units. Therefore, too many assumptions are being made and this solution is flawed.