Numbers 1 100

Respuesta correcta: A) Ten

• A) TenTen is the English word for the numeral 10.
• B) Two'Two' is the word for 2, not for 10.
• C) Twelve'Twelve' is the word for 12, one more than ten.
• D) Twenty'Twenty' is the word for 20, which is 10 more than ten.

Respuesta correcta: B) Ten

• A) Nine5 + 5 is not nine; the two numbers must be added, and 5 plus 5 is 10.
• B) Ten5 + 5 = 10, so the sum is 'Ten'.
• C) Six'Six' is not the result of adding 5 and 5; adding them gives ten.
• D) Eleven'Eleven' is 10 + 1, but nothing adds one more to the 5s.

Respuesta correcta: C) Twenty

• A) Thirty'Thirty' is ten more than nineteen, but the number immediately after 19 is 20.
• B) Twelve'Twelve' is smaller than nineteen, so it cannot come after it.
• C) TwentyCounting on from nineteen (19) gives twenty (20), the next multiple of ten.
• D) Eighteen'Eighteen' is the number before nineteen, not the one after it.

Respuesta correcta: D) Fifty

• A) Fifteen'Fifteen' is the number 15, not 50.
• B) Five'Five' is the number 5, not 50.
• C) Five-zero'Five-zero' is how you read a telephone number, such as 5-0-0; 50 is fifty.
• D) FiftyFifty is 50: five tens, written 50 without a hyphen.

Respuesta correcta: A) 100

• A) 100One hundred is written 100: a 1 followed by two zeros.
• B) 1010 is ten, not one hundred.
• C) 10001000 is one thousand, which has three zeros.
• D) 11 is just one, not one hundred.

Respuesta correcta: B) Forty-two

• A) Fifty'Fifty' is ten more than forty-three, so it comes after, not between.
• B) Forty-twoForty-two sits exactly between forty-one and forty-three.
• C) Forty'Forty' comes before forty-one, so it cannot be in the middle.
• D) Forty-four'Forty-four' is greater than forty-three, so it comes after the pair.

Respuesta correcta: C) Fifty

• A) Forty-one'Forty-one' is not a round ten, and the series counts by tens.
• B) Seventy'Seventy' skips past the missing term; sixty follows the gap.
• C) FiftyThe series counts 20, 30, 40, then 50, then 60, so the missing number is fifty.
• D) Ten'Ten' is far below the series; each term is ten more than the last.

Respuesta correcta: D) Ninety-nine

• A) Eighty-nineEighty-nine is 100 minus 11, not the result of 100 minus 1.
• B) Ninety-oneNinety-one is 100 minus 9, not 100 minus 1.
• C) One hundred'One hundred' would be the answer if nothing were being subtracted.
• D) Ninety-nine100 minus 1 leaves 99, which is written 'ninety-nine'.