Assuming 6 legs for each insect, 19 insects will have 114 legs.
But, there are 126 − 114 = 12 extra legs.
It is important to note that spiders have 8 legs and flies have 6 legs. So, there are 2 extra legs per spider on the web.
Thus, the 12 extra legs belong to 6 spiders.
Alternative Solution through Equations:
be the number of spiders and f
be the number of flies. Then,
= 19; and
On solving the above two equations, we get
+ 6 (19 − s
) = 126; or
= 126 − (6 × 19).
Food for thought:
Wish to try another puzzle similar in concept to this one? Then click here.