"Dad, where had you been?" asked Colin."I had been to the attic, my son," replied Dad. "And do you know what I saw there? There was a big web with 21 spiders and flies on it.""How many spiders were there?" asked the little boy with curiosity."Well, there were a total of 138 legs on the web," answered Dad with a smile. "Now you can find out how many spiders were there by yourself. Can't you?"Can you help the little boy find out how many spiders were on the web in the attic?
nahi mila kya genius
17 spiders each spider has 8 legs, total legs of spider 136 and 2 legs of colin's dad. Total 138
6 spiders,15 flies
Total 6*8+15*6=48+90=138 legs
s+f= 218s+6f=1388s+6(21-s)=1388s+126-6s=1382s-126=1382s=138-1262s=12s=6So,Spider = 6Flies = 156*8+15*648+90138 Legs