Solve using the guess-and-test strategy.

Ira has 28¢ in his pocket. He has 20 coins that are either pennies or nickels.

How many nickels does Ira have?

A.
26

B.
22

C.
18

D.
2

Question

Solve using the guess-and-test strategy.
 
Ira has 28¢ in his pocket. He has 20 coins that are either pennies or nickels. 
 
How many nickels does Ira have?
 
 A.
26
 
 B.
22
 
 C.
18
 
 D.
2

welshfella · Answer

i'm from the uk - how many cents are there in a nickel and a penny?

anonymous · Answer

nickel is 5 cents and a penny is 1 cent

welshfella · Answer

oh ok

welshfella · Answer

well he can't have a lot of nickels

welshfella · Answer

because 18 nickels = 90 cents and he only has 28 cents
so what do you think?

welshfella · Answer

so l8 nickels or more cannot be correct.

anonymous · Answer

is 22 the answer

welshfella · Answer

No because 22 nickels  = 5*22 = 110 cents.

anonymous · Answer

oh

welshfella · Answer

- and he only has 28 cents

welshfella · Answer

Do you follow the argument?

anonymous · Answer

is the answer 2

welshfella · Answer

yes- it must be.

welshfella · Answer

and if you add it up it comes to 28 cents
2 nickels = 10 cents + 18 pennies = 28 cents and total coins = 20.