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0 sats \ 0 replies \ @cryotosensei OP 4 May \ on: Are you smarter than a 12-year-old? #11 science
Total number of coins = 86 x 2 = 172
If all coins were 20-cent ones,
amount = 172 x $0.20 = $34.40
$90.40-$34.40 =$56.00
$1-$0.20 =$0.80
No. of $1 coins = $56 / $0.80 =70
No. of 20-cent coins = 172 - 70 = 102 (ANS)