Question
There are a total of 140 pieces of 5-cent coins, 20-cent coins and 50-cent coins in Japheth's piggy bank. 25 of these coins are 5-cent coins. The number of 50-cent coins is thrice the number of 20-cent coins.
  1. How many 50-cent coins are there?
  2. What is the total value of the 50-cent coins in Japheth's piggy bank?
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

There are a total of 140 pieces of 5-cent coins, 20-cent coins and 50-cent coins in Japheth's piggy bank. 25 of these coins are 5-cent coins. The number of 50-cent coins is thrice the number of 20-cent coins.
  1. How many 50-cent coins are there?
  2. What is the total value of the 50-cent coins in Japheth's piggy bank?